Which class of organisms gather their energy directly from the sun?

they are called autotrophs...

Explanation:

Autotrophs,  which also called producers are the organisms which are able to produce the more complex substances like proteins fats and carbohydrates from what is around them (the sun and also carbon dioxide and water...)

HOPE THIS HELPS!!

the fossil record provides evidence of a common ancestor to many species.

the answer is c. it will give up it's valence electron to the other atom.