Match column A with B.

Column A              Column B

a. Carnivores           i. Green plants

b. Producres          ii. Secondary or tertiary consumers

c. Decomposers        iii. Primary consumers

d. Herbivores            iv. Bacteria

Correct option is A

The correct answer is (a) a–ii, b–i, c–iv, d–iii

• Carnivores are animals that eat other animals, hence they are secondary or tertiary consumers → (a–ii)

• Producers are green plants that synthesize food through photosynthesis → (b–i)

• Decomposers are mostly bacteria and fungi that break down dead matter → (c–iv)

• Herbivores feed on plants and are primary consumers in the food chain → (d–iii)

Information Booster:
• Trophic levels:

• Producers → First trophic level

• Herbivores (Primary Consumers) → Second

• Carnivores (Secondary/Tertiary Consumers) → Third/Fourth

• Decomposers act across all levels by recycling nutrients
  • Examples:

• Producer: Grass

• Herbivore: Deer

• Carnivore: Lion

• Decomposer: Bacteria/Fungi
  • Decomposers play a vital role in maintaining ecosystem balance by nutrient cycling.
  • Energy flow in ecosystems follows the 10% rule – only 10% of energy transfers from one level to the