Final answer:
The sentence 'The Grand Canyon is in the state of Arizona.' would make a good topic sentence for a factual essay on the Grand Canyon.
Step-by-step explanation:
The sentence 'The Grand Canyon is in the state of Arizona.' would make a good topic sentence for a factual essay on the Grand Canyon. A topic sentence should introduce the main idea of the paragraph, and this sentence provides a clear factual statement about the location of the Grand Canyon.
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