Answer:
The "high energy" link in ATP is the one between the second and third phosphate groups. A phosphoanhydride bond is the name given to this connection.
Step-by-step explanation:
Three phosphate groups are joined to an adenosine molecule to form ATP. The first phosphate group forms a phosphoester link with the adenosine molecule, and the second and third phosphate groups form phosphoanhydride bonds with one another. High-energy potential is present in the bond between the second and third phosphate groups. Because of the strong electrostatic attraction between the negatively charged phosphate groups, the phosphoanhydride bond is a high-energy bond. Breaking this link releases energy that cells can use for a variety of biological processes.