In CAD design, which view helps to visualize the cutting process of an object?

The cutting plane line is a crucial element in CAD design that indicates where the object is "cut" to reveal internal features and details. When a section view is created based on the cutting plane line, it shows a slice of the object, providing insight into its internal structure that is not visible in standard views. This visualization aids designers and engineers in understanding how different components fit together, assessing internal geometries, and evaluating material distribution and defects within the object.

Other options do not focus specifically on visualizing the cutting process. A detail view shows a specific part of the object at a larger scale but does not imply a cutting action. Countersink refers to a type of machining process for creating a conical hole, which is unrelated to visualization of cutting an object's profile. The design workspace, while integral to the overall design process, does not pertain to the specific action of visualizing a cutting plane. Hence, the cutting plane line stands out as the appropriate option for visualizing the cutting process in an object.