Which of the following represents the duration of activities against a calendar?

A Gantt chart is a graphical tool that represents the duration of activities against a calendar. It shows the start and end dates, dependencies, and progress of each activity in a project. A Gantt chart can help project managers to plan, schedule, monitor, and control the project activities. It can also help to identify the critical path, which is the longest sequence of activities that determines the minimum time required to complete the project. Reference: CBAP / CCBA Certified Business Analysis Study Guide, 2nd Edition, page 47 What Is a Gantt Chart? | Definition & Examples | APM Activity Duration Estimates: Definition, Importance and Techniques - Indeed, under What are activity duration estimates?