In expository writing, why is having a clear central idea important?

It allows for creative exploration of various ideas and concepts.
It maintains a consistent and organized structure throughout the piece.
It encourages emotional connections with the readers.
It helps the author express personal opinions and biases.

Having a clear central idea is important in expository writing because it maintains a consistent and organized structure throughout the piece. This central idea serves as the thesis or main point that the writer is trying to convey to the reader. It provides a roadmap for the rest of the essay and helps to prevent the writing from becoming disjointed or unfocused. Additionally, a clear central idea helps the reader to understand the purpose and message of the writing, making it easier for them to follow along and absorb the information being presented. It also allows the writer to effectively support and develop their main argument or point, leading to a more cohesive and coherent piece of writing.