Define a food chain. Design a terrestrial food chain of four trophic levels. If a pollutant enters at the producer level, the organisms of which trophic level will have the maximum concentration of the pollutant in their bodies? What is this phenomenon called?
Food chain - It is the chain of organisms through which energy is transferred in the form of food by the process of one organism consuming the other.
Grass → Insect (grasshopper) → Frog → Snake
(Producer) (Herbivore) (carnivore) (top carnivore)