Question

Which of the following represents a correct food chain?

• A. Grass $\rightarrow$ Snake $\rightarrow$ Frog $\rightarrow$ Hawk
• B. Grass $\rightarrow$ Frog $\rightarrow$ Insect $\rightarrow$ Hawk
• C. Grass $\rightarrow$ Insect $\rightarrow$ Frog $\rightarrow$ Snake $\rightarrow$ Hawk
• D. Insect $\rightarrow$ Grass $\rightarrow$ Frog $\rightarrow$ Snake

Hint:

The arrow ($\rightarrow$) always indicates the direction of energy flow: "is eaten by."
Ensure the chain starts with a green plant (autotroph) in a grazing food chain.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
A food chain is a linear sequence showing how energy passes from one organism to another.
It must start with a Producer (T1) and follow correct predator-prey relationships.

Step 2: Detailed Explanation:
Let's evaluate the biological accuracy of each sequence:
(A) Grass $\rightarrow$ Snake: Snakes are carnivores; they do not eat grass. Incorrect sequence.
(B) Grass $\rightarrow$ Frog $\rightarrow$ Insect: Insects eat plants, and frogs eat insects. This sequence is out of order.
(C) Grass (Producer) $\rightarrow$ Insect (Herbivore) $\rightarrow$ Frog (Primary Carnivore) $\rightarrow$ Snake (Secondary Carnivore) $\rightarrow$ Hawk (Top Predator). This follows the correct natural hierarchy.
(D) Insect $\rightarrow$ Grass: The sequence must start with a producer. Insects do not produce energy for grass. Incorrect.

Step 3: Final Answer:
Option (C) correctly describes the unidirectional flow of energy through appropriate trophic levels.