Answer: A (catabolism and Anabolism)
Explanation:
Metabolic pathway are basically divided into two categories.
1. Catabolic
2. Anabolic
Catabolic (degradation) pathways, where energy rich complex macramolecules are degraded into smaller molecules. Energy released during this is trapped as chemical energy, usually as ATP.
Anabolic (biosynthesis) pathways. The cells synthesize complex molecules from simple precursors. This needs energy.
Know what happens? P.S. If it doesn't help sorry
Answer-Because when fossil fuels are burned,the fossil fuels are running out more and more and so sientists are trying to figure out a way for fossil fuels to become more of a renewable resources then a nonrenewable resource so that we have more of a likely cause that we will have a future use of all the fossil fuel that are about to run out just like an extinct species.
Your welcome if it worked!
Endocrine glands is the organ.