How photosynthesis and cellular respiration create a metabolic pathway?

A metabolic pathway is a system of interrelated biochemical reactions that transform a molecule or molecules of a substrate through a series of metabolic intermediates, step by step.

Explanation:

Photosynthesis is a "developing," or anabolic, pathway, which builds sugars out of smaller molecules. Cellular respiration, by comparison, breaks down sugar into smaller particles and is a pathway that is "breaking down," or catabolic. Anabolic pathway: in bigger ones, small molecules are assembled.

the reason the two sea urchins don't compete with each other for food, resources, etc. is because the urchins have adapted to the environment but they have also adapted to each other. this is most likely because the genes of the sea urchins.

the answer would be d