How to split fragment a single page into multiple pages for easier management

I want to develop a news site which has different sections like related, suggested, top stories.

Instead of coding all these pages into a single page, I want to fragment the main page into multiple pages. For eg, section ‘abc’ should have ‘abc’ and section ‘xyz’ would be coded into ‘xyz’ page. But to the user ‘abc’ and ‘xyz’ should appear in a single ‘main’ page.

Is there a plugin available or if custom code is required. Please help