Energy is added to your body's chemical store when you eat food.
Energy is stored there until you need it.
Your body then transfers it to your thermal store when you need to keep warm, or to your kinetic store to move about.
Bank account
We can think of energy stores and transfers as a bank account.
You earn money by doing work, then save it until there is something you want.
You then transfer it to another person to buy whatever it is you want.
In animals, energy is stored in the chemical store. To allow animals to move, energy is transferred from the chemical store to the kinetic store. The energy is converted during respiration.