how energy transfers between trophic levels. Why is more energy required to produce meat and fish products than to produce grains, vegetables, and other plant crops?

Energy can pass from one trophic level to the next when organic molecules from an organism's body are eaten by another organism. ... On average, only about 10% of the energy stored as biomass in one trophic level—e.g., primary producers—gets stored as biomass in the next trophic level—e.g., primary consumers