Which of the following best describes how to collaborate with others in Google Drive?

Collaborating in Google Drive is one of its key features, and the best description is that multiple users can edit documents in real-time. This functionality allows for seamless teamwork, as several individuals can work on a single document simultaneously, seeing each other's changes as they happen. It enhances communication and enables efficient workflow since contributors do not have to wait for others to finish their edits before making their own. This real-time collaboration is particularly beneficial for group projects, allowing for immediate feedback and brainstorming among team members.

The other options do not accurately reflect how collaboration works in Google Drive. For instance, the first option suggests that only one person can edit a document at a time, which contradicts the core functionality of real-time editing widely used in collaborative environments. The idea that editing is not allowed once a file is shared is also incorrect, as users can continue to edit shared files based on their permission settings. Lastly, suggesting that collaboration is only possible through email attachment overlooks the ease of sharing through Drive itself, which allows for simultaneous access and editing by multiple users without the cumbersome process of email.