Question

when we are sleeping then also we have to need of energy....?. If yes give reasons to your answer.

Answer 1

i guess no..because we became tired..then we fell sleepy..otherwise..we required no energy for sleeping.
sleeping helps to save our body energy

Answer 2

Yes because if even we are sleeping our breathing process is continuing which needs energy and the food is also digested in the body which needs energy or else blood circulation process is also taking place.

Hopefully this may helps.