Which of the following best describes coherence in writing?

Coherence in writing is best defined by the ability to create logical connections that help ideas flow smoothly from one to the next. Achieving coherence means that a writer effectively organizes their thoughts and ideas in a way that makes sense to the reader. This involves using transitional phrases, maintaining a clear focus on the topic, and structuring paragraphs that support the main idea in a logical sequence. When writing is coherent, it allows readers to easily follow the writer's train of thought, making the message clearer and improving overall comprehension.

In contrast, the other options disrupt the clarity and flow essential for coherence. Mixing unrelated ideas creates confusion and makes it difficult for readers to see how the ideas are connected. While complex vocabulary can enhance writing, it does not inherently lead to coherence; if used excessively or inaccurately, it can alienate readers. Similarly, varying sentence structure can be beneficial, but doing so excessively without a clear intention can disrupt the flow and coherence of a piece. Therefore, emphasizing logical connections is fundamental to achieving coherence in writing.