Answer:
In an informational text, everything else in the text should relate to and support the main topic or central idea. The main topic or central idea is the core concept that the text is designed to convey to the reader. All the information, evidence, explanations, and details provided in the text should be directly connected to, relevant to, and supportive of this main topic or central idea. This ensures that the text remains focused and coherent, making it easier for the reader to understand and retain the key information presented.