How is a food web related to energy flow within an ecosystem

Here's why :The amount of energy at each trophic level (producers, consumers, secondary consumers,etc.) decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat.

answer; ///digestive system,,alimentary system,gastrointestinal system and the gi

answer; /// i believe the correct answer is (reactants);