Which feature is used to transform a solid cube into an open cube?

The transformation of a solid cube into an open cube typically involves using a feature that modifies the geometry of the solid to create openings or voids. The correct choice identifies the specific functionality designed to alter the shape of solids directly.

In Solid Edge, the "Transform Solid Cube Feature" refers to a specific operation suited for modifying the solid geometry. This feature allows you to apply operations that can remove material or change the form of the solid cube seamlessly, effectively turning it into an open cube by creating a hollowed area or cutting portions away.

Understanding why this is the correct feature emphasizes the importance of direct operations in solid modeling. The other options may refer to different functionalities that do not directly pertain to the modification of a solid body into an open structure. For example, assembly features are more about managing multiple parts and their relationships, fit and fixed patterns deal with replicating features in a defined manner, and revolved features create shapes based on rotational symmetry rather than altering a solid cube's form.