Question

which of the following is correct? matter is constantly destroyed on earth. energy stays in an ecosystem forever. energy flows into and eventually exits an ecosystem.

Explanation:

According to the law of conservation of matter, matter is neither created nor destroyed on Earth, just transformed. Energy in an ecosystem enters mainly through photosynthesis and is lost as heat over time, not staying forever. Energy does flow into an ecosystem (e.g., sunlight) and eventually exits (as heat).

Answer:

Energy flows into and eventually exits an ecosystem.