Ablack hole is formed by a high-mass star collapses, and essentially, a black hole is a gravity drain. Given these facts, what is formed by a high-mass star collapses among the following options:
- grave error
 - an object
 - a gravity drain
 - mass grave
 - deoxyribonucleic acid
 - Physical weathering
 - gravity depletion
 - hydrogen and oxygen


 

   a gravity drain      