Answers

2014-06-01T14:57:22+05:30
See, in ancient times people could not talk. At that time they hunted animals, ate raw food and lived in forests. As they learnt to communicate, they began to share their ideas with each other, and that helped them in making discoveries and invention.
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if it helped u can mark it as the best
2014-06-01T20:35:16+05:30
Sound is very important as it is very important to understand what others r saying
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