ANSWER:
Energy stored in ATP is released by the hydrolysis or breakdown of the ATP.
Step-by-step explanation:
ATP is a small molecule that is the energy centre of a cell. The energy released from ATP is used by cells for various functions.
Hydrolysis of ATP is water mediated breakdown into ADP and is a reversible process. The energy released by ATP is consumed very quickly by the cells and therefore this energy needs to be regenerated in the ATP.