Because the reader needs to be able to understand what he/she is talking about.
Unlike thesis statements, topic sentences can be questions that your paragraphs<span> answer. A topic sentence presents the main point for a paragraph and gives your readers a clear idea of what the individual paragraph is about. Ideally, your topic sentences should relate to your thesis statement.</span>
UDHR Universal Declaration of Human Rights
A collaborative discussion is a group of people identifying factors in an issue. To evaluate a collaborative discussion may include the following factors: the discussion must include others; develop a sense of audience that others will be scrutinizing your information; learning about writing conventions with peers; focusing on readers' expectations and not just rules; improving the writer's analysis techniques; being able to answers others' questions about material; improving their prose by teaching it to others.
