C) 10%
The efficiency of energy transfer from one trophic level to the next higher level is around 10%. This means that only 10% of the energy available at one trophic level is transferred to the next level. The rest of the energy is lost as metabolic energy (heat) or used up for other purposes such as growth or reproduction. Therefore, energy transfer between trophic levels is inefficient, and this is one reason why food chains are typically limited to only a few links.
.
The efficiency of energy transfer from a lower trophic level to the next higher level is roughly:
A 1%
B 5%
C 10%
D 80%
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