Stars that are not very hot but give off a lot of light are ? nebula main sequence stars giants dwarfs

Stars that are not very hot but give off a lot of light are giants 
Their temperatures are low, usually between 7,000 and 2,000 
But since they are giants, they emit more light. 

Answer = Giants. 

Good Luck! :)

B.a pop up at ion changes in response to a change in the environment.

The correct answer is:   [b]:   "distortion" .