Three elements of a good paragraph:

1. Unity: A good paragraph should have a clear and focused topic that is supported by relevant details and examples. All sentences in the paragraph should relate to the main idea and work together to develop and support that idea.

2. Coherence: A good paragraph should be well-organized and easy to follow. Transitions between sentences and ideas should be smooth and logical, helping the reader to understand the flow of the paragraph. Additionally, the use of cohesive devices such as pronouns, conjunctions, and transitional words can help to connect ideas and create a cohesive whole.

3. Development: A good paragraph should be well-developed, with enough detail and explanation to fully explore the topic. This can include providing examples, evidence, and analysis to support the main idea. By developing the paragraph fully, the writer can ensure that the reader gains a thorough understanding of the topic being discussed.

1. Topic sentence
2. Supporting sentences
3. Concluding sentence