2. What is the difference between requirement validation and requirement
verification?

Verification checks that the software does what is required, Validation checks that the software does what the user really needs.

the answer is d underlined.

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.