Choose the correct food-chain order from producer to top predator among the following living things. 1. Frog 2. Eagle 3. Grasshopper 4. Snake 5. Grass

Introduction / Context:
Food-chain questions require identifying producers, primary consumers, secondary/tertiary consumers, and apex predators. The sequence must respect trophic levels.

Given Data / Assumptions:

• 5 Grass: producer (autotroph).
• 3 Grasshopper: primary consumer (herbivore).
• 1 Frog: secondary consumer (insectivore).
• 4 Snake: tertiary consumer (predator of frogs).
• 2 Eagle: apex predator.

Concept / Approach:
Order by trophic level: producer → primary → secondary → tertiary → apex.

Step-by-Step Solution:
1) 5 Grass forms the base.2) 3 Grasshopper feeds on grass.3) 1 Frog feeds on insects.4) 4 Snake preys on frogs.5) 2 Eagle may prey on snakes.

Verification / Alternative check:
Energy flow is unidirectional; reversing any predator–prey pair breaks ecological logic.

Why Other Options Are Wrong:
(a) Puts snake before frog; (b) starts with frog not producer; (d) begins with consumer and misorders levels; (e) misplaces frog/grasshopper.

Common Pitfalls:
Confusing food webs (many-to-many) with a single chain; ignoring that producers must be first.

Final Answer:
5, 3, 1, 4, 2