The continuous interaction goes on within an eco-system.
This interaction between components and sub-components involves the flow of energy and cycling of mineral nutrients.
In this process transfer of energy takes place from one level to another.
This is known as trophic level.
Therefore, trophic level is the level or the stage at which food energy passes from one group to another.
To understand it in a better manner we have to discuss about food chain and its associated activities.
In the biosphere, there are broadly two groups of living organisms.
Autotrophs and heterotrophs.
On the basis of food habits, these heterotrophs are further sub-divided into three categories.
They are herbivores, carnivores and omnivores.
Herbivores are plant eating animals, carnivores are flesh eating animals and omnivores are both plant and animal eating organisms.