What tool can help create transparency in group projects?

Team Drive is the most appropriate tool for creating transparency in group projects because it is specifically designed for collaborative work within teams. It allows members to store, share, and manage files collectively, ensuring that everyone has access to the same information. This feature encourages open communication and makes it easy to track contributions, changes, and updates made by each team member, thereby fostering a sense of accountability and collaboration.

While Hangouts can facilitate communication between team members and Google Calendar can help manage scheduling and deadlines, these tools do not inherently provide a shared space for all project-related documents. Google Photos, on the other hand, is primarily for storing and sharing photos, which may not be relevant to project transparency and collaboration.

In contrast to these options, Team Drive acts as a central repository for files related to group projects, ensuring that everyone involved can view and edit the same documents in real time, thus enhancing overall transparency.