AP BIOLOGY

Detailed explanation-1: -All of the interconnected and overlapping food chains in an ecosystem make up a food web. Organisms in food chains are grouped into categories called trophic levels. Roughly speaking, these levels are divided into producers (first trophic level), consumers (second, third, and fourth trophic levels), and decomposers.

Detailed explanation-2: -The many overlapping food chains in an ecosystem make up a food web. As you move up the energy pyramid, each level has less energy available than the level below. The amount of energy that moves from one feeding level to another in a food web. Producers form the base of the food web.

Detailed explanation-3: -A food web is all of the food chains in an ecosystem. Each organism in an ecosystem occupies a specific trophic level or position in the food chain or web. Producers, who make their own food using photosynthesis or chemosynthesis, make up the bottom of the trophic pyramid.