Answer:
C. Only the movement of matter occurs in an unending cycle.
Step-by-step explanation:
Living organisms require both energy and matter for their growth and development. Nutrients are the nonliving matter of an ecosystem. Matter in form of nutrients moves from the soil to the plants, which absorb them using their roots. Matter moves to organisms called consumers when they feed on the plants and themselves consecutively.
When these organisms die, the matter goes back to the soil and the cycle starts again. Energy, on the contrary, moves in one direction. However, only the movement of matter occurs in an unending cycle.