Question

is the percentage of average total energy available to a trophic level that is passed to the next trophic level.
less than 5%
10%
100%

Explanation:

In an energy pyramid, only about 10% of the energy from one trophic level is passed on to the next. This is due to energy being lost as heat during metabolic processes (like respiration), used for growth, repair, and movement, and not all of the organism being consumed (e.g., bones in some cases). Less than 5% is too low - ecosystems would not be sustainable with such low transfer rates over multiple trophic levels. 100% is impossible as energy is always lost at each level.

Answer:

10%