Which command would you use to measure the area of a closed object?

Using the AREA command is the correct choice when you want to measure the area of a closed object in AutoCAD. This command provides a straightforward and efficient way to obtain the area measurement by allowing you to simply select the object or define a closed boundary. When using the AREA command, AutoCAD recognizes the geometric properties of the selected object and calculates the area accordingly, presenting the measurement in the command line or the properties palette.

The other commands have different functions: LIST provides detailed information about selected objects, including their properties but does not specifically calculate area. MEASURE is used for measuring distances and not areas, and DIMAREA is used for creating a dimension that indicates the area of a defined object, but it does not directly compute the area like the AREA command does. Thus, for the purpose of measuring the area specifically, AREA is the most appropriate and effective command.