Question

Which reason best explains why living things need carbon?

Carbon bonds are a source of energy.
Carbon levels reduce global temperatures.
Carbon acts as an important solvent.
Carbon is everywhere.

Answer 1

I would go with A. it's the only one that makes sense

Answer 2

Carbon Bonds are a source of energy

Explanation:

If this were a free answer response question, I would say that the reason would be that carbon can form bonds with many other element, but it wasn't there, so the first option is the closest to my answer.