Final answer:
The horizontal axis in a Gantt chart typically represents time, with bars on the chart indicating the start, duration, and completion of different tasks within a project. The correct option is A.
Step-by-step explanation:
In a Gantt chart, the horizontal axis usually represents time. This type of chart is commonly used for project management purposes, as it provides a visual timeline for when tasks or components of a project are scheduled to start and finish.
The vertical axis, on the other hand, typically lists the tasks or project components. Each task is represented by a bar; the position and length of the bar reflect the start date, duration, and end date of that task.
Using a Gantt chart allows managers and team members to track project progress and understand how different tasks overlap and relate to one another over time. It also helps to identify potential bottlenecks and scheduling conflicts, making it easier to adjust plans accordingly.