Question

which reason best explains why living things need carbon? carbon is everywhere. carbon acts as an important solvent. carbon levels reduce global temperatures. carbon bonds are a source of energy.

Explanation:

Carbon - containing compounds are the basis of organic chemistry and are fundamental to life processes. Living things need carbon because carbon bonds are a source of energy through metabolic processes like cellular respiration. Carbon is used to build biological molecules such as carbohydrates, lipids, proteins, and nucleic acids.

Answer:

Carbon bonds are a source of energy.