Trophic levels:
Hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to primary sources of energy.
An example of food chain:
grass ⟶ grasshopper ⟶ frog ⟶ snake
• Plants are the producers and represents the first trophic level.
• Grasshoppers are the primary consumers, and represent the 2nd trophic level.
• Frogs are the secondary consumers, and represent the third trophic level
• Snakes are the tertiary consumers and represent the fourth trophic level.
