Answer:
The trophic efficiency, this is, the measure of how much of the energy in
organisms at one trophic level is transferred to the next higher trophic
level, of each trophic level is around 10 percent.
Thus, considering a three step food chain, where you get 1000 calories entering at the autotroph level, the amount of energy that would pass to the primary consumers would be 100 calories (10% of 1000).
Then. the amount of energy that would pass to the secondary consumers would be 10 calories (10% of 100).
Finally, the amount of energy lost is the difference between the initial entering energy, 1000 calories, and the final energy, 10 calories:
(1000 - 10) calories = 950 calories
