What element is essential for a paragraph to have coherence?

For a paragraph to demonstrate coherence, it is crucial that there is a clear main idea that guides the content. This main idea should be supported by logical connections between sentences. When these connections are present, the reader can easily follow the writer's train of thought and understand how the ideas relate to one another, making the overall argument or narrative more effective.

Coherence ensures that each sentence flows smoothly into the next, allowing the reader to grasp the relationships among the ideas being presented. This typically involves the use of transitional words or phrases and consistent topic sentences that reinforce the main idea. Thus, the presence of a clear main idea combined with logical connections creates a cohesive paragraph that enhances readability and comprehension.

In contrast, presenting random ideas, discussing multiple topics at once, or merely repeating the same point does not contribute to coherence, as these approaches can confuse the reader or dilute the message.