Which of the following is an auto body type?

Unibody is considered an auto body type because it refers to a construction method where the vehicle's body and frame are integrated into a single piece. This design is common in modern vehicles as it provides a lightweight structure that can enhance fuel efficiency and improve safety during collisions. Unibody construction allows for better use of space and can lead to more effective manufacturing processes, making it a significant aspect of automotive engineering.

In contrast, the other options either describe specific frame types or concepts that are less common or not standard terminology in the automotive industry. These terms may relate to specific designs or configurations but do not generally reflect broadly recognized auto body types like unibody does. Understanding this foundational concept is essential for grasping the distinctions in automotive design and construction.