What percent of energy is transferred between the levels indicated by the blue arrows?
a. 50
b. 90
c. 100
d. 10

d)10%

this is due to the fact that energy is lost from organisms through respiration and excretion so that each member progressively receives less biomass and energy. also the members of the trophic levels decrease as you go up a food chain

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.