All Kinds of Posters Energy flows, food chain, photosynthesis, glucose. Except for a few exceptions, all of the energy for all life and human technology comes from the SUN . Animals and humans can't eat sunshine.
Plants are the first level in the food chain .
Matter also flows through life but in this section we are only talking about energy. This flow of energy is transported through the animals by a system biologists often call the food chain . A food chain in a given ecosystem is usually very complicated but it is useful to think of the food chain in the four simple steps or levels described below. The drawing below only shows three steps. The flow of energy through life is not an endless cycle.