Final answer:
Only about 10 percent of the energy at one level is available to the next level in an energy pyramid. The average percentage transfer of energy from one level to another is similar for various energy pyramids in nature.
Step-by-step explanation:
In an energy pyramid, only about 10 percent of the energy at one level is available to the next level. The other 90 percent of the energy is used for metabolic processes or given off to the environment as heat. This loss of energy explains why there are rarely more than four trophic levels in a food chain or web.
The statement that the average percentage transfer of energy from one level to another is similar for many different types of energy pyramids in nature is True. Despite variations in the specific numbers, the overall pattern of energy transfer remains consistent.