The hollow bones of birds, which keep birds lightweight for flying, is an example of

An "adaptation."  It's the natural way that birds of flight adapt to their needs or environment which makes them more efficient.  :)

This is what i found on google “when one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and atp is converted to adenosine diphosphate (adp). likewise, energy is also released when a phosphate is removed from adp to form adenosine monophosphate (amp).” i hope this you .