What is a trophic level? What does it represent in an ecological pyramid?

Explanation

(1). Trophic level is the feeding position in a food chain.
(2). In an ecological pyramid, the first trophiclevel represents the primary producers, and their number, biomass or energy.
(3). Second trophic level represents the herbivores or primary consumers and their number, biomass or energy.
(4). Third trophic level represents the lower carnivores or secondary consumers and their number, biomass or energy.
(5). Fourth trophic levels represents the higher carnivores or terityar consumers and their number, biomass or energy.
Trophic levels: