Each level of the energy pyramid is called a trophic level. How does the amount of energy available to organisms differ at each trophic level in a food chain?​

Most of the food energy that enters a trophic level is "lost" as heat when it is used by organisms to power the normal activities of life. Thus, the higher the trophic level on the pyramid, the lower the amount of available energy

your answer is "the 1950's"

thats not even an aswer choice