In CAD techniques, which term best describes a sketch's capability to become a 3D object?

The term that best describes a sketch's capability to become a 3D object is "extrusion." In CAD applications, extrusion is a process that takes a 2D shape—created as a sketch—and extends it along a perpendicular axis to create a three-dimensional object. This technique effectively adds depth to the two-dimensional sketch, allowing it to take on solid form and volume.

When a designer creates a profile in 2D, they can utilize the extrusion command to specify how far they want that profile to extend in the third dimension, seamlessly transforming the sketch into a fully-fledged 3D object. This fundamental aspect of solid modeling is crucial in various fields, such as manufacturing and product design.

The other terms mentioned relate to different aspects of CAD design: "fillet" involves rounding the edges between two surfaces or lines; "engineering drawing" refers to a technical representation of an object, typically in 2D; and "drive joint" does not directly correspond to the process of converting a sketch to a 3D object. Thus, extrusion is the most relevant term in this context.