Which relationship can be used to ensure two components stay parallel?

The relationship that ensures two components stay parallel is the parallel relationship. This feature establishes a condition between the selected components such that they maintain a constant orientation in relation to one another throughout any modifications or adjustments made in the assembly. By using the parallel relationship, users can control the alignment of components effectively, ensuring that their faces or axes remain parallel, which is essential for maintaining proper function and aesthetics in assembly design.

In contrast, the mate relationship is used for aligning components in a specific manner that involves coinciding or connecting two surfaces or edges, but does not specifically enforce parallelism. The tangent relationship defines a connection where two components touch at a single point but does not relate to maintaining parallelism. The coincident relationship permits two components to share a single point, making them move together but not ensuring they maintain parallel orientations.