Question

most important reason for decrease in biodiversity is    (a) habitat pollution                  (b) introduction of exotic species    (c) over exploitation              (d) habitat destruction

Answer 1

HELLO FRIEND HERE IS YOUR ANSWER,,,,,,,,

Many reasons mentioned above already are top objectives of getting the biodiversity and it's state completely destroyed.

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In all of the mentioned options one can rule out introduction of exotic or in biological terms $\textbf{Invasive Species}$ in order to confirm why can we rule this reason out to cause a subtle decrease in biodiversity?

Here it is, The total impact of introducing new exotic species to an environment which is beforehandly adapted it can be considered as a ecosystem balancer in preserving the natural state of species biodiversity itself, some might argue about the affects of not ably reproducing comfortably by introductions of exotic or Invasive species where it was not meant to be there in the first place.

Quite many of Invasive species being welcomed to a new area with new adaptations, generally they cannot adapt it and eventually die off, one advantage to be put here is lack of predatory organisms, low competition, growth factors perfectly valid (or in the sense , nurtures the quip nature), valid and perfect conditions for reproduction, new adaptation, etc.

Invasive species have abilities to outperform and defeat in a competitive nature for obtaining resources in widely available formats, this indeed makes native species susceptible and naive to counter the efforts made by those "exotic" or "Invasive species" and basically changes and makes the normal functioning of a typical ecosystem out of the axis or, not compatible to a prior environment.



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$\textbf{Habitat Pollution}$ is a complicated, versatile, delicate and broad topic of consideration which includes some specific points to be the "most important reason for reducing biodiversity".

Wide effectuals for air pollution in a negative way can be classified under four major pollutants contributing to reduction of biodiversity (I literally mean it as per their part played in reducing potential species drastically) , namely, nitrogen, ozone, Mercury and sulfuric components, they contribute to increasing acidity in rains via nitrogen in aquatic and marine formed ecosystems and, Mercury increasing the cases for declining of organisms by poisoning and increasing levels of Mercury, it also contributed to complete acidification of ponds and lakes, increased eutrophication of coastal watery bodies and estuaries connected due to tributaries, increasing bioactive bioaccumulation of toxic Mercury components increased every day with parts per million units in aquatic ecosystems, food webs and food chains.

Documentation of ecosystems established on lands is contributed through acidification of soil in ecosystems containing forests as a major part, due to which plants are grown in low fertile and stunted plant growth which hundred percent contributes to compositions getting reflected in lower quantities that is, the acquired essential nutritional mediums making them sensitive to acidity increasing concentrations plus making the functioning of forest lowered and non-functional. Poisonous Gases which are also contributing in good terms are likely to affect more, one example to reflect this would be "Ozone", it is known to cause drastic reductions! it also hinders the life changing process called photosynthesis, they always bring about chronic or short term changes in these dispositions as, acute or long term affectance is likely to get rejected, one case to support this would be elemental effects of aluminium observed in organisms residing in aquatic levels, only when there is extremely high acidity in water surfaces.

In all, it would be slightly applicable to say habitat pollution might reduce biodiversity if it is produced in quite high amounts without any excessive leaks of pathogens containing doses of exhibiting lethality in organisms. Monitoring the potential higher effects of air pollution (of attained) should be put under critical observation based on geographic regions it was affected from.



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Over exploitation and Habitat destruction are interrelated and locked into a same zone for drastic reduction of species and potential destruction of biodiversity, either due to artificially created environments or artificial destruction by man made objectives to industrially propel into higher sectors. Natural habitat destruction is less likely to happen. Over Exploiting a specific species reduces only specific region related species, it can be easily controlled by human influences, campaigns and protests, as of the above mentioned two options these two options can get controlled if those rejecting the rules get into a cordial for accepting this biodiversity as a nature's gift.



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Option $\textbf{Habitat Pollution}$ is more applicable.