This reads a little bit like a question (or part of a question) from a homework, in which case we've not been provided with enough information to answer the question. read more
A food chain represents the movement of biomass and/or energy through a food chain. For the purposes of studying food chains, the only energy that matters is the chemical potential energy stored in the various chemicals (carbohydrates, lipids, proteins etc) that make up various organisms in the food chain, so biomass and energy are pretty much interchangeable for this purpose. read more
Electric eels eat any type of food that is available to them.Because of this, they are considered to be opportunistic feeders. read more