Studying how the Earth (a) / rotated around the Sun has (b) / deepened our knowledge of (c) / planetary motion and celestial dynamics. No error (e)
Understand the Problem
The question is testing your knowledge of English grammar and sentence structure. You need to identify which part of the sentence, if any, contains a grammatical error. The sentence discusses how studying the Earth's rotation around the Sun has deepened our understanding of planetary motion and celestial dynamics.
Answer
The error is in part (a); 'rotated' should be 'rotates'.
Part (a) contains an error. The wording should be 'rotates' instead of 'rotated' to agree with the tense and meaning of the sentence.
Answer for screen readers
Part (a) contains an error. The wording should be 'rotates' instead of 'rotated' to agree with the tense and meaning of the sentence.
More Information
The sentence describes an ongoing, habitual action (the Earth's rotation around the Sun and its impact on our knowledge). Therefore, the present tense 'rotates' is more appropriate than the past tense 'rotated'.
Tips
A common mistake is overlooking the intended meaning and tense consistency within the sentence.
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