Introduction:
In the Writing section of the IELTS exam, it is highly recommended to write in paragraphs. Paragraphs serve as a structural tool that helps organize your ideas and present them in a coherent and logical manner. Although it is not explicitly mentioned in the instructions, using paragraphs can significantly enhance the readability and clarity of your writing.

Importance of paragraphs:
1. Logical organization: Writing in paragraphs allows you to present your ideas in a logical and systematic manner. Each paragraph can focus on a specific point or topic, enabling the reader to follow your line of thought easily. This helps to avoid confusion and ensures that your ideas are presented coherently.

2. Clarity and coherence: Paragraphs provide a clear visual break between different ideas or arguments. By separating your thoughts into distinct paragraphs, you make it easier for the reader to identify the main points you are trying to convey. This enhances the overall clarity and coherence of your writing.

3. Readability: Large blocks of text can be daunting and overwhelming for the reader. Breaking your writing into paragraphs not only makes it visually appealing but also improves readability. It allows the reader to navigate through your ideas smoothly and reduces the chance of information overload.

4. Effective communication: Writing in paragraphs helps you effectively communicate your thoughts and ideas. Each paragraph acts as a mini-essay, focusing on a specific aspect of your topic. This allows you to provide sufficient explanation, examples, and evidence to support your arguments, leading to a more convincing and persuasive piece of writing.

Tips for using paragraphs:
1. Topic sentences: Start each paragraph with a clear topic sentence that introduces the main idea or argument of that paragraph. This helps the reader understand the focus of each paragraph and its relation to the overall topic.

2. Transition words: Use appropriate transition words or phrases to link your paragraphs together smoothly. This ensures a seamless flow of ideas and helps the reader follow your train of thought.

3. Avoid overly long paragraphs: Aim for paragraphs that are around 3-5 sentences long. If a paragraph becomes too lengthy, it may indicate that you are trying to address multiple ideas, and it would be more effective to split it into two or more paragraphs.

4. Proofread: After writing, carefully review your work to ensure that your paragraphs are well-structured and effectively convey your ideas. Check for coherence and logical progression between paragraphs.

Conclusion:
Writing in paragraphs is highly recommended in the IELTS Writing section as it helps to organize your ideas, enhance clarity and coherence, improve readability, and effectively communicate your thoughts. By using paragraphs effectively, you can present your arguments in a more structured and persuasive manner, ultimately leading to a higher score in the exam.