What feature allows you to control how much interaction each person has with a shared project file?

The correct choice is the one that pertains to managing the interaction level individuals have with a shared project file, which is achieved through sharing permissions. Sharing permissions determine what actions users can perform on the document, such as view, edit, or comment. This feature is significant because it empowers users to maintain control over their shared work environments, ensuring that collaborators interact with the file in a manner that aligns with the project's needs and the creator's intent.

Utilizing sharing permissions effectively can prevent unauthorized changes and maintain the integrity of the document, ultimately contributing to a smoother collaborative process. The ability to specify these interactions helps in protecting the content while promoting collaboration among team members, fostering an environment where ideas can be exchanged safely and productively.