All stars reflect light from the sun.
b. appear to wander off their star paths.
a.
c. produce their own light.
d. All of the above.

option c

Produce their own light

hope it helps

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

the contamination

we are putting to many trash.