A topic sentence can be best described by the fact that it is helpful in introducing a broader topic to the readers. Therefore, the option B holds true.
What is the significance of a topic sentence?
A topic sentence of a passage can be referred to or considered as a sentence that is more solid and states solely about the central idea or the theme of the entire passage. It also lets the readers known about the topic of the passage through a single sentence.
A topic sentence does not offer a detailed evidence regarding the topic of the passage, as its focus is broader in sense, and moreover, it introduces its readers to a broader topic in the passage.
Therefore, the option B holds true and states regarding the significance of a topic sentence.
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