Which of the following drawings would be most useful when making a part?

The detail drawing is essential when making a part because it provides precise and specific information about a single component. It usually includes critical dimensions, tolerances, material specifications, and other details necessary for manufacturing. These attributes are crucial for ensuring that the part is made accurately and functions as intended within an assembly.

While assembly drawings serve to show how multiple parts fit together, they do not provide the level of detail required for the individual manufacturing of a part. Sketches may provide a rough representation or concept but lack the official specifications needed in a production environment. Blueprints can reflect a more comprehensive view, including both detail and assembly, but are generally less focused on the minutiae of a single part compared to a detailed drawing. Thus, for the purpose of making a part, a detail drawing is indispensable as it focuses solely on the individual component's requirements.