Question

1. which of these flows and cycles between the living and nonliving parts of an ecosystem?

matter
energy
neither matter nor energy
both matter and energy

Explanation:

In an ecosystem, matter cycles between the living and non - living parts. For example, elements like carbon, nitrogen, and water cycle through processes such as decomposition, photosynthesis, and respiration. Energy, on the other hand, flows in one direction (from the sun to producers to consumers to decomposers) and is not cycled in the same way as matter.

Answer:

matter