Which option should you select to lock to a sketch plane in the PathFinder?

To lock a sketch plane in the PathFinder, the appropriate selection is to "Lock Sketch Plane." This option is specifically designed to secure the sketch to a defined plane, ensuring that any modifications made to the sketch maintain its association with that plane throughout the design process. This is particularly important in 3D modeling environments where maintaining the orientation and position of a sketch is crucial for subsequent modeling features like extrudes or revolves. By locking the sketch plane, you prevent unintended movements or alterations that could occur if the sketch were simply attached or aligned without this level of control.

The other options, while related to sketching functionality, do not provide the same level of permanence in terms of securing the sketch to a specific plane. "Attach Sketch" is typically about creating a connection to a feature rather than locking down the entire sketch to a specific orientation. "Set Sketch Plane" refers to selecting a plane for the sketch rather than locking it, which implies you can still modify or change that setting afterward. "Align to Sketch Plane" suggests positioning an element relative to a sketch plane but does not imply a locking mechanism. Hence, choosing "Lock Sketch Plane" is the precise action needed to ensure the stability and integrity of the sketch in relation to its designated plane