Which of the following project management tools helps visualize project timelines?

C. Gantt charts are specifically designed to visualize project timelines. They provide a graphical representation of a project schedule, showing the start and finish dates of various elements of a project. This allows project managers and team members to easily see how tasks overlap, the duration of each task, and overall project schedules at a glance. Gantt charts are straightforward, helping to identify dependencies between tasks as well as critical milestones in the project timeline, ensuring effective time management and resource allocation.

While other tools like planning and scheduling tools or dashboards may aid in project management, they do not provide the same level of visual timeline representation that Gantt charts do. Reporting tools may present data about project progress but typically do not visualize timelines in the way Gantt charts do. Thus, Gantt charts stand out as the primary tool for visualizing project timelines effectively.