Q3 of 34 Page 217

We should plant trees along roadside. Explain why.

Planting trees along roadside is helpful because

1. Plants reduce noise pollution.


2. Plants reduce air pollution.


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1

Mention the range of audible sound of us.

 2

Mention the reason behind the creation of noise.

 4

Explain in brief about hearing impairment.

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Explain how does a sound making object differ from one that is silent.