Food chain — arrange organisms/resources logically Items: 1. rat 2. eagle 3. snake 4. grain 5. field

Introduction / Context:
Basic terrestrial food chain from producer habitat to apex predator.

Step-by-Step Solution:
Field (5) → Grain (4) → Rat (1) → Snake (3) → Eagle (2).

Why Other Options Are Wrong:
They disrupt trophic levels or invert predator–prey order.

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