What is the primary purpose of using a complex sentence as a topic sentence?

Using a complex sentence as a topic sentence serves to connect old information to new information, making it clearer for the reader how different ideas are related. This type of sentence structure allows the writer to provide context and depth, often combining an independent clause with one or more dependent clauses. This combination can illustrate the relationship between established concepts and new insights or arguments being introduced.

For instance, a complex sentence might remind the reader of previously discussed ideas while simultaneously adding a new perspective or layering additional information. This technique enhances comprehension by providing a roadmap for the reader, allowing them to follow the thought process more smoothly. By effectively bridging concepts, complex sentences can make a paragraph more cohesive and understandable, showcasing how the text builds on prior knowledge while introducing fresh ideas.