Answer:
All items that have been formatted as Headings 1, 2, or 3 and Title will be added.
Step-by-step explanation:
Table of content is a table which is added at the start of the document and contain all the list of headings,subheadings, title of chapter and there relevant page number so any one can see what content is available in the document and then can access that content from the table of content as well by scroll down the document.
When table of content is created from the feature available in Microsoft Word then it will add Title of a chapter and under that title all the headings of that chapter.
I hope it will help you!