What defines a paragraph?

A paragraph is best defined as a series of connected sentences that focus on one main topic. This structure helps to organize thoughts and ideas clearly, allowing readers to easily understand the message being conveyed. Each sentence within the paragraph supports or elaborates on the main idea, creating coherence and unity.

In a well-structured paragraph, the topic is typically introduced in the first sentence, known as the topic sentence, followed by supporting sentences that provide additional details, examples, or explanations. This format is essential for effective communication in writing, as it enables the reader to follow the writer's line of reasoning or narrative smoothly.

This option captures the essence of what constitutes a paragraph, whereas the other options fail to reflect the necessary coherence and focus that define a proper paragraph structure. For instance, a single word sentence lacks the depth and development needed, while unrelated sentences do not create a cohesive idea. Similarly, a brief summary of multiple topics does not allow for the thorough exploration of a singular theme, which is a core characteristic of a well-constructed paragraph.