Why does each successively higher feeding level in an energy pyramid have less biomass

I guess this is late...

10% rule.

Explanation:

Only 10% of the biomass and energy moves up the pyramid. The other 90% is used for bodily functions.

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added