Question

which of the following is a correct food chain? snake → mouse → grass human → fish → algae hawk → rabbit → grass sun → grass → cow → human

Explanation:

A food - chain shows the flow of energy from one organism to another. It starts with a producer (an organism that makes its own food, usually a plant) and moves up to consumers. In the options:

• In "Snake → Mouse → Grass", the order is wrong as grass (producer) should be at the start.
• In "Human → Fish → Algae", algae (producer) should be first.
• In "Hawk → Rabbit → Grass", grass (producer) should be first.
• In "Sun → Grass → Cow → Human", the sun provides energy for grass (producer) which is eaten by cow (primary consumer) and then humans (secondary consumer). Although the sun is not an organism in the traditional food - chain sense, the flow from grass to cow to human is correct in terms of energy transfer among living organisms.

Answer:

Sun → Grass → Cow → Human