How do stars recycle matter? A. They stay on the main sequence.
B. Black holes form and recycle stellar gas for new stars.
C. Gravity pulls together gases and matter from old stars to create new ones.

C

Explanation:

Stars forge heavy elements and return their gas to space. This material enriches gas clouds from which new stars are formed, and the cycle continues. Each generation of stars is made in part from the ashes of previous generations.

i am pretty sure the awsers is d.