Question

what is the ultimate source of energy that is in our food?

Answer 1

The ultimate source of energy in our food is the Sun. Through the process of photosynthesis, plants convert sunlight into chemical energy, storing it in the form of carbohydrates, fats, and proteins. When animals eat plants (or other animals that have consumed plants), they obtain this stored energy. Thus, the energy in food ultimately originates from the Sun, which drives the entire food chain.