Arrange the elements of a simple field food chain from source to top consumer. 1. Rat 2. Eagle 3. Snake 4. Grain 5. Field Choose the correct ecological sequence.

Introduction / Context:
The question asks for a typical terrestrial food chain. Energy flows from producers to herbivores to carnivores and finally to apex predators.

Given Data / Assumptions:

• Field is the habitat containing producers.
• Grain represents producer (plant matter).
• Rat is a primary consumer (herbivore/omnivore).
• Snake is a secondary consumer (carnivore) eating rats.
• Eagle is a tertiary consumer/predator.

Concept / Approach:
Order by trophic levels: habitat context → producer → primary consumer → secondary consumer → tertiary consumer.

Step-by-Step Solution:
Field (5) provides context.Grain (4) is the producer.Rat (1) eats grain.Snake (3) eats rat.Eagle (2) preys on snakes/rodents.

Verification / Alternative check:
Standard ecology diagrams depict exactly this chain in many school texts.

Why Other Options Are Wrong:
Any order placing consumers before producers or top predators before intermediate consumers is illogical.

Common Pitfalls:
Confusing “field” as a trophic level—here it is the setting, logically listed first for clarity.

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