The research findings revealed a troubling pattern _______ regions with higher pollution levels consistently showed lower biodiversity.

5
reading

Which choice completes the text so that it conforms to the conventions of Standard English?

A

pattern:

B

pattern,

C

pattern;

D

pattern—

Correct Answer: A

Choice A is the best answer. This question tests colon usage to introduce an explanation.

  1. Context clues: The second clause explains what the "troubling pattern" is.
  2. Meaning: A colon can follow a complete sentence to introduce an explanation.
  3. Verify: "The research findings revealed a troubling pattern: regions with higher pollution levels consistently showed lower biodiversity" correctly introduces the explanation.

đź’ˇ Strategy: Use a colon to introduce an explanation or elaboration after a complete sentence.

Choice B is incorrect because a comma creates vulnerability to a comma splice interpretation. Choice C is incorrect because a semicolon suggests equal ideas, not explanation. Choice D is incorrect because while a dash could work, a colon is more appropriate for direct explanation.

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