Why are comets unlikely to be able to support life? a. a comet's environment is not stable. b. a comet does not have an atmosphere. c. a comet does not have a reliable energy source. d. all of these

A comet is an small, icy celestial body that releases gas when it gets near to stars in a process called outgassing. Thus, acomet's environment is not stable, and it does not have an actual, permanent, atmosphere. A comet also does not have a reliable energy source. Thus, D. All of these are the answers on why comets cannot support life.

It will fall off and tip over.