What means that all the details relate to the topic sentence?

When all the details relate to the topic sentence, it means that every piece of information provided supports, explains, or elaborates on the main idea presented in that sentence. This coherence ensures clarity and focus within the paragraph, helping readers easily understand the central theme. Relevant details reinforce the topic, making the argument or narrative stronger and more persuasive. Overall, this alignment enhances the overall effectiveness of the writing.