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

In a food web, primary producers, such as plants and phytoplankton, typically store the most energy. Through photosynthesis, they convert sunlight into chemical energy, which is then available to higher trophic levels. This energy diminishes at each trophic level due to the inefficiencies of energy transfer, with only about 10% typically passed on to consumers. As a result, primary producers are the most energy-rich organisms in the food web.