Question

2. Explain how a pesticide used at a harmless concentration can become the cause
for the deaths of a large number of animals at the higher levels of a food chain.
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Answer 1

Answer:

this can lead to death of large no. of animals because the inflated air coming from the crops becomes poisonous

Answer 2

yes it's true

Explanation:

it is harmless at see extent but today's farmers use lots of pesticides and these pesticides due to flowing water get mixed into water ( It can be a River) And many fishes die because this forms a layer above water and stops oxygen form getting dissolved inside water and many animals like cow who drink that water may not die suddenly rather because of that water the cow starts getting fatal diseases and this might spread to other cows that the person who takes care of that cow will also get that diseases causing a wide spread dead of living beings