Question

plz tell me answer tell only answer plz tell only answer plz.......................​

Answer 1

Answer:

I hope it helps you.....

Explanation:

no.1:–

The increased level of nutrients in water helps aquatic animals in their survival because dissolved oxygen is taken in by algae and many types of plants. ... Because of this reason, there is generally a lack of dissolved oxygen for all types of animals that live in it.

no:–2

Pure air is free from germs and harmful gases. It contains 78% nitrogen, 21% oxygen and small amount of other gases and dust particles. Polluted air contains harmful gases and unwanted substances.

no.:–3

Clear and transparent water is not always fit for drinking. Water might appear clean, but it may contain some disease causing micro-organisms and other dissolved impurities. Hence, it is advised to purify water before drinking. Purification can be done by water purifying systems or by boiling the water.

no:–4

steps can be taken to reduce air pollution at individual level:

1. Use of bicycles more than the fuel based vehicles.
2. Public transport can be used more than the private vehicles for commuting.
3. Planting of saplings will provide a pollution free air in near future .
4. Avoid burning leaves, trash, and other materials.