What is the name of the option in most presentation applications with which you can modify slide elements?

The option that you’re looking for is the Insert Tab.

Slide elements generally refer to the objects that you can put inside a slide in most presentation programs. This includes elements such as shapes, texts, pictures, videos, and even audio files. The Insert Tab can generally be accessed on the toolbar pinned to the top of your presentation program.

answer is:

a). backstage view

explanation:

backstage view is the area where files and data about them is managed— creating, saving, printing, sending to others, inspecting for hidden metadata or personal information, and setting options. so in this way we can add many things to our document swiftly.

i hope you get the idea.