Help on the question above

C because energy is not recycled and not all the energy is passed from one level of the food chain to the next. Energy may be lost as heat (released during respiration), through movement, or in materials that the consumer does not digest. matter is recycled in ecosystems. Decomposers release nutrients when they break down dead organisms and these nutrients could be used by plants

the answer is C

Explanation:

the reason is because the energy is not recycled.

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.