Answer:
in this case is table of contents
Explanation:
If Melanie want to organize the content, she can use index or table of content, but for specific sections table of content is easier to use.
For example:
Melanie can organize the titles in different levels like subtitle at the same page.
1 History..................................1
1.2 USA History....................1
1.3 California History..........1
Melanie have to mark every title and subtitle in the document like "History -title 1", "USA History - title 2", "California History - title 3".
Melanie can create the table on content automatically in Word: at the section -> Reference -> table of content.
Readers can locate every important section by page, title and subtitle.