write ten lines on the topic -- ' how can you recognise diversities as strength? ' class 6
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Answer:
Because it has solid scientific and biological reasons for saying this
EVERY living being on the face of the earth is either in competition or has attained some degree of symbiosis. Either they are competing for light / food / oxygen / physical space or they are literally in a Darwinian competition, who devours who.
In the case of multi-cellular beings, unicellular beings are at the same time our greatest tenants, helpers and opponents. Literally, every human being has more 'inquiline' bacteria than 'native' cells[1]. In at least one extreme case, the mitochondria simply settled inside ALL of our cells.[2] While they help us to digest certain foods, they can also produce certain unpleasant side effects… like gas. Or diarrhea. Or botulism.
If this half-tamed 'zoo' can cause problems in terms of diversity and absolute numbers, it is nothing compared to what exists in our environment
Make no mistake, the primary defense we have is a layer of non-reactive cellular material (almost a Teflon), which bacteria and the like have difficulty penetrating. Because the cells are already dead. Yes, that's right, the top layer of skin. It's no coincidence that almost any 'scratch' in this layer ends up turning red not because of blood, or the body trying to close the skin. It is the immune system fighting the opportunistic bacteria / viruses / fungi that found living cells below the layer, humm, sealant.
'What does not prove the need for the immune system, nor does diversity affect its efficiency'
Wrong.
Ever heard of the Acquired Immunodeficiency Syndrome? Popularly known as AIDS? Using computer terms (which in this case copied the terms of biology) a virus that 'weakens' / disables the anti-virus program, by using it to reproduce.
And what is the influence of diversity? Well, we have the emblematic cases of isolated populations when they come into contact with a new disease. As was the case with the 'conquest' of America.

In medieval Europe (and until near the XIX century) people and animals lived very close, even ‘raining cats and dogs’, i.e., when rained strong enough it bothered the cats and dogs that lived in the same house. And they ‘fall’ from the usual sleeping places near the roof
Many of the diseases that develop in humans also develop in other animals. You have heard of 'bird flu', 'swine flu' and perhaps also heard that the first vaccine (against smallpox) was derived from a very similar disease (cowpox) that attacked the cows[3].
But how did these diseases not kill the Europeans? Is it not a case of 'inferior blood', unable to create immunity? No, in fact, the Europeans were dying too. Sometimes whole cities. But after the Black Death, Europe was not exactly overpopulated. The population nuclei were small, and the mobility of people, smaller (few people moved between cities), the deaths did not reach catastrophic levels.
Immunity was gained in the traditional ways: inheriting from parents (especially through breast milk) and SURVIVING the most common childhood illnesses. Infant mortality, especially up to 5 years of age, was very large. The most accepted number is between 30% to 50% of children DIDN’T survive early childhood (coincidentally, this is the source of the obsession of several Christian churches with 'grow and multiply').
How do we know this still applies? Well ... doctors have learned to do this 'mixing' of diseases from various populations artificially. It’s how modern vaccines are created, especially against the Influenza.
Viruses are collected from various parts of the globe, are 'weakened' (in some way) so that they can not reproduce easily (sometimes this fails partially .. a small post-vaccine influenza are considered normal) and after the person 'survived' the weakened version (cowpox -> smallpox) now has immunity.
Then yes, in a medical sense and in the Darwinian sense, diversity is strength.
“It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change.” Charles Darwin
Explanation:
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