Work is being done in which of these situations? all motions are at a constant velocity (including velocity = zero).

This would be canberra.

They did not study the continental drift

Most smaller stars don't have a radiative zone.

Atp, shorthand for adenosine triphosphate, is the standard molecule for cellular enger in the human body. all motion and metabolic  processes  within the body begins with energy that is released from  atp, as its phosphate bonds are broken in cells through a  process  called hydrolysis.