(a) What are producers, primary consumers, secondary consumers and tertiary consumers? Give one example of each.
​(b) Write a food chain having four trophic levels. Mark the producer and various types of consumers in it.

(a) Producers - Producers are organisms which can produce their own food and are autotrophic in nature. Example: plants
Primary consumers - Primary consumers are herbivores which feed on plants. Example: rabbit
Secondary consumers - Refers to organisms who are carnivores and feed on other animals for their nutrition. Example: snake
Tertiary consumers - Refers to organisms who feed on animals which eat other animals. Example: Hawk

(b) Plant (Producer) → Grasshopper (Primary consumer) → Frog (Secondary consumer) → Snake (Tertiary consumer)