Which of the following is an example of a collaborative tool?

Google Docs is a prime example of a collaborative tool because it allows multiple users to work on the same document simultaneously in real-time. Users can see each other's edits, leave comments, and make suggestions, fostering a dynamic collaborative environment. This capability enhances teamwork, especially for projects that require input from multiple people, as everyone can contribute from different locations without the need for physical meetings.

In contrast, Microsoft Word and Excel, while they do have some collaborative features, primarily function as individual applications where collaboration is often limited compared to what Google Docs offers. Photoshop is mostly used for graphic design and editing purposes and does not inherently focus on collaborative document creation or editing, making it less suitable for teamwork in the same way that Google Docs does.