Paddy field – Grasshopper – Frog – Snake – Eagle
Paddy field represents the primary producer which are plants.
Grasshopper is a primary consumer. Primary consumers are organisms that eat the primary producers and are usually herbivores.
Frog is a secondary consumer. Secondary consumers are organisms that eat the primary consumers and are generally meat-eaters/carnivores.
Snake is a tertiary consumer. Tertiary consumers are organisms that eat the secondary consumers. These organisms are carnivore-eating carnivores, like snakes or big fish.
Eagle is a quaternary consumer and in this case it is the apex consumer because it occupies the highest position in the food chain.