Which organism in the food web below is likely to store the most energy?

Because autotrophs use photosynthesis (The process of how plants create energy from carbon dioxide), they create the energy and food heterotrophs need to live. There is a thing called an energy pyramid, which is somewhat similar to a food chain or food web. On each "level" of the pyramid, the amount of energy passed through each animal has decreased by 10%, making the original autotroph the organism that has the most energy.

The organism in the food web with the most energy is the autotroph.