Answer:The purpose of text lines in a document or argument is to:1. **Present Information Clearly:** They help organize and present information in a structured manner.2. **Support Arguments:** Provide evidence or examples to back up claims or statements.3. **Enhance Readability:** Break content into manageable sections for easier reading and understanding.4. **Guide the Reader:** Direct the reader through the flow of ideas or arguments.5. **Clarify Points:** Offer detailed explanations or elaborations on key points.