Select the most appropriate option to fill in blank number 3.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. mean.
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The word "mean" is suitable in this context to indicate clarification or definition. In this case, it is used to explain what is meant by the term "cold-blooded animals."
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The other options ("intent," "express," "designate") do not convey the same sense of providing a definition or clarification in this particular sentence.
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Therefore, the correct option is "mean."