Which indicator best reflects a writer's ability to stay on topic?

The ability to stay on topic is best reflected by a writer's consistency in addressing the subject matter throughout their text. When a writer sticks to a topic, they maintain focus and coherence, ensuring that each part of their writing contributes to the overall message or argument being made. This proficiency allows readers to follow the writer’s ideas seamlessly, making it easier to understand and engage with the content.

The other choices highlight behaviors that indicate a lack of focus or disregard for cohesiveness in writing. Generating irrelevant ideas shows a deviation from the topic, while writing without a final sentence can leave a piece feeling unfinished. Although having a clear conclusion is important, it does not necessarily indicate that the writer has consistently remained on topic throughout the entire text. Sticking to a topic ensures that all components of the writing work together effectively.