Science Class 5 Pollution

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

If a factory is built near a forest and starts releasing thick black smoke, why might the local bird population decrease even if the birds aren't breathing the smoke directly?

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A The smoke makes the birds' feathers too heavy to fly.
B The pollution kills the insects and plants the birds need for food.
C The birds prefer to live in cities with more smoke.
D The smoke turns the trees into a color the birds don't like.

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Answer: B. The pollution kills the insects and plants the birds need for food.

The answer is B) The pollution kills the insects and plants the birds need for food, and the explanation is that pollution affects the entire ecosystem, meaning if the "bottom" of the food chain is harmed, the animals at the top suffer too.

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If a factory is built near a forest and starts releasing thick black smoke, why might the local bird population decrease even if the birds aren't breathing the smoke directly?

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