Which characteristic is essential for maintaining unity in writing?

Sticking to a single main idea is essential for maintaining unity in writing because it allows the writer to focus on a specific point without introducing distractions or confusion. This focus helps the reader to easily follow the narrative or argument being presented. When writing centers around a single main idea, every supporting sentence and detail can be directly related back to that core concept, enhancing coherence and clarity.

In contrast, including unrelated information, varying sentence lengths excessively, or using multiple topics in one paragraph can distract from the main point and disrupt the flow of the writing. These strategies may lead to a disjointed structure where readers struggle to grasp the primary message, undermining the overall effectiveness of the communication. Maintaining unity by focusing on one main idea is the backbone of clear and effective writing.