Which of the following best explains why ecosystems need a continual influx of new energy?
a. photosynthesis feeds herbivores, carnivores, and decomposers.
b. as energy is recycled, a small amount is lost as heat.
c. energy flows through an ecosystem and cannot be recycled.
d. cellular respiration does not feed back into other processes.

The option that best explains why ecosystems need a continual influx of new energy is C. energy flows through an ecosystem and cannot be recycled. Given that it cannot be recycled, and it comes and goes, ecosystems need new energy to replace the old one they may have lost over time. Other answers don't really make much sense and don't have a lot to do with energy/

Id so