Geometric tolerances that control the alignment of features with respect to one or more datums are termed what?

The correct choice focuses on orientation tolerances, which are specifically designed to control the alignment of features in relation to one or more established datums. In the context of geometric dimensioning and tolerancing (GD&T), orientation tolerances help ensure that components are positioned correctly relative to each other, thereby facilitating proper assembly and function.

Orientation tolerances are critical in ensuring that features such as holes, surfaces, or axes are oriented correctly with respect to reference points. This is important because misalignment can lead to assembly issues or functionality problems, especially in complex assemblies where precise fits are necessary.

While other types of tolerances, such as profile, form, and positional tolerances, exist, they serve different purposes. Profile tolerances relate to the contour of a surface, form tolerances concern the shape of features, and positional tolerances specify the allowable variation in the location of features relative to datums, but they do not exclusively address the aspect of alignment. Thus, orientation tolerances uniquely fulfill the requirement of controlling feature alignment with respect to datums.