What is energy ???
explain !!!​

In physics, energy is the quantitative property that must be transferred to a body or physical system to perform work on the body, or to heat it. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.

the capacity for doing work

but aj Mera andar bilkul bhi energy nahi h a

i would say the answer is food.

hope this !