Select the most appropriate option to fill in blank no. 2.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. causes
Context:
The sentence is: “The fact that the wetter periods in North Africa have 1 every 21,000 years or so is a big clue about what 2_ them: variations in Earth’s orbit.”
Here, the blank (2) needs a word that explains what creates or brings about these wetter periods.
Analysis of the given options:
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debates: means discussions or arguments – doesn’t fit.
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bids: means offers or attempts – incorrect here.
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delegates: means representatives – contextually wrong.
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causes: means brings about, produces – perfectly fits the meaning.
Hence, the chosen option is correct.