Question

an energy pyramid is shown. which best explains why a pyramid is used to represent energy flow within an ecosystem? 29 available energy increases when moving up an energy pyramid. the size of the organisms decreases when moving up the energy pyramid. the population size of organisms increases when moving up an energy pyramid. available energy decreases when moving up an energy pyramid.

Explanation:

In an ecosystem's energy flow, only about 10 - 20% of energy is transferred from one trophic level to the next. As we move up the energy pyramid from producers to top - level consumers, available energy decreases. This is why an energy pyramid is shaped like a pyramid.

Answer:

Available energy decreases when moving up an energy pyramid.