Question

7. Shanthi's grand father told her that when he was a small child he saw more birds like sparrow and
mynah. Can you make two guesses why their number have becomes less
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Answer 1

Deforestation (cutting of trees), increase in the number of buildings and pollution are the main reasons behind the reduced number of sparrows and mynah.

Explanation:

I hope it is helpful for you

Answer 2

Answer:

because of cutting of forest's rapidly or polluted air in atmosphere