Question

why our body need energy

Answer 1

To do work energy provides a stamina to ur body which helps u do work like run , sit ,walk

In simple language Energy is the capability to do work

Answer 2

the body need energy to do works
and we get energy from foods
which our body convert into mechanical energy

works like
walking,

breathing also consume energy

also for digesting food, body needs energy

and also for our brain

etc.

hope it helps you
@di