Food chain (producer to apex predator): Arrange— 1. Frog, 2. Eagle, 3. Grasshopper, 4. Snake, 5. Grass.

Introduction / Context:
Food chains begin with producers (plants), followed by primary consumers (herbivores), then secondary/tertiary consumers up to apex predators.

Given Data / Assumptions:

• Grass = producer.
• Grasshopper = herbivore (primary consumer).
• Frog = insectivore (secondary consumer).
• Snake = predator of frogs (tertiary level).
• Eagle = apex predator.

Concept / Approach:
Arrange by trophic levels.

Step-by-Step Solution:

Verification / Alternative check:
Matches typical textbook chains.

Why Other Options Are Wrong:
They start with consumers or misplace apex predator.

Common Pitfalls:
Switching frog and snake.

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