Question

1. What are the important substances that we

use in day to day life? For what purposes do we

use them?​

Answer 1

Answer:

electricity

comb

lighter

bulb

water

toothpaste

brush

clothes

food

air

shelter

Answer 2

Aɴsᴡᴇʀ ...

The following are the importance of sound in our lives: It helps us to communicate with others. By sound, we can understand the context of the words spoken. Sound can help people to protect themselves from danger such as the sound or horn of the train and other vehicles warn people to give way etc..

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