Final answer:
Engineering drawings are the type of drawings that make a reference design buildable, providing detailed technical specifications necessary for construction or manufacturing. They represent the transition from concept sketches to detailed designs, often aided by computer-aided design (CAD) software.
Step-by-step explanation:
The type of drawing that enables a reference design to be eventually buildable is A) Engineering drawing. Engineering drawings are essential for conveying the technical details and specifications required to ensure that any structure, machine, or system can be built and function as intended. Throughout history, drawing has served as a foundational tool for planning compositions, with sketches marking the first step in the creative process. In the modern context, architects and engineers rely on these preliminary drawings to develop intricate design concepts before moving to more technical phases that may involve CAD software, technical scale drawings, and 3D models.
Engineering drawings encompass a variety of technical specifications and are a major step in transitioning from a conceptual design to detailed blueprints. They outline the functional elements and physical components, forming the design architecture. As technology has advanced, the use of CAD programs has become increasingly prevalent, supporting architects and engineers in creating realistic, accurate, and efficient designs. These designs ultimately serve as the blueprint from which construction companies and manufacturers can produce the physical entity.