What chemical change occurs to ATP when it reacts with water and releases energy?

a
ATP binds to chlorophyll to allow plants to use the sun's energy.
b
The ATP molecule loses a phosphate, becoming ADP.
c
The ATP molecule becomes membrane bound as a sodium-potassium pump.
d
The ATP molecule gains a phosphate, becoming ADP.

b. The ATP molecule loses a phosphate, becoming ADP.