Answer:
Tri means three.
Step-by-step explanation:
The prefix tri means three phosphate molecules are present in in molecule of ATP. ATP molecule is used by the living organisms for performing different activities such as movement, running and breathing etc. When the energy is needed the break down of ATP occurs in which ATP is converted into ADP and phosphate ion, this phosphate ion is used as energy whereas when there is food available this ADP is again converted into ATP.