O Levels Biology (5090)•5090/12/O/N/21

Explanation
Understanding Food Chains in Ecosystems
Steps:
- Recall that a food chain models how energy transfers in an ecosystem from producers to consumers.
- Identify key elements: it involves a sequence of organisms where each feeds on the previous one.
- Evaluate choices for accuracy in describing energy flow through multiple organisms.
- Select the option that precisely captures the linear diagram of energy transfer.
Why C is correct:
- A food chain is defined as a diagram illustrating the flow of energy through a linear sequence of organisms, from producers to top predators, as per ecological principles.
Why the others are wrong:
- A: Focuses on a single organism's feeding, not the full chain sequence.
- B: Contains a grammatical error ("chain organisms") and lacks clarity on the sequence.
- D: Describes trophic levels but ignores the organismal sequence and energy flow.
Final answer: C
Topic: Energy flow
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