Which of the following is a key role of the project manager?

The key role of the project manager is to lead, coordinate, and manage project activities. This encompasses a broad range of responsibilities and ensures that all aspects of the project are effectively aligned with its objectives. The project manager serves as the central figure who guides the team, facilitates communication among stakeholders, and ensures that resources are allocated efficiently.

By coordinating activities, the project manager ensures that team members are working collaboratively towards the common goal, managing timelines, and addressing any issues that arise during the project lifecycle. This leadership is essential for maintaining motivation and focus among the team, as well as for navigating challenges that may impact project delivery.

Other roles listed, such as developing project constraints, creating the initial project proposal, and writing the project closure report, are certainly important tasks that may involve the project manager or require their input. However, they do not encapsulate the overarching responsibility of leading and managing the entire project, which is central to the project manager's key role.