In a simple food chain, small fish eat algae; bigger fish eat the smaller fish; bears eat the bigger fish. using the above scenario, which of these would have the largest amount of energy?

Algae would have the largest amount of energy.

A food chain is an illustrative diagram that contains many arrows which point from one organism to another, indicating food energy flow from one feeding group of organisms (consumer) to another. From the given question, algae would have the largest amount of energy. This is because algae is the organism at the base of the food chain and it is the first producer. Algae conducts oxygenic photosynthesis and obtains its energy directly from sunlight and inorganic nutrients. In the food chain, large amounts of energy is usually lost (as heat) as energy is transferred from one tropic (feeding) level to another. Due to this, the upper level consumers such as the bears in the food chain would have the lowest amount of energy.