Set 8: Central Ideas (Intermediate)
Explanation
PASSAGE
The following text describes a biological interaction. Symbiosis is a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic. In mutualism, both organisms benefit from the relationship. An example is the clownfish and the sea anemone: the fish protects the anemone from polyp-eating fish, while the stinging tentacles of the anemone protect the clownfish from its predators.
Which choice best describes the relationship between the clownfish and the sea anemone?
Detailed Explanation
This question asks you to identify the main point of the passage. Choice D is the best answer. The text uses the clownfish and sea anemone as 'An example' of 'mutualism,' where 'both organisms benefit.' It details how each protects the other. This matches Choice D.
Choice A is incorrect because neither harms the other.
Choice B is incorrect because both benefit.
Choice C is incorrect because they are not described as competing. Remember that supporting details help prove the central idea but are not the main point themselves. The author's central idea should be broad enough to encompass the entire passage while still being specific enough to be meaningful. Ask yourself what the author most wants you to understand.
Key Evidence:
• "In mutualism, both organisms benefit"
• "fish protects the anemone... anemone protect the clownfish"
Why others are wrong: A (Contradicts text - describes mutual benefit), B (Contradicts text - describes mutual benefit), C (Irrelevant - not mentioned).
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