What type of vehicle construction uses the core and body panels for structural support?

The correct choice is unibody, as this refers to a construction method where the body and chassis of the vehicle are integrated into a single piece. In unibody construction, the vehicle's structural integrity is derived from the design of the body itself, which includes core and body panels that are engineered to provide strength and support.

This type of construction enhances safety and performance by distributing energy during impacts and minimizing weight, which can lead to improved fuel efficiency. Unibody designs have become the standard in modern automobile manufacturing because they can offer greater rigidity and ease of assembly compared to other methods.

The other construction types, such as body-on-frame, involve a separate frame that supports the body, thereby relying more on the frame for structural strength rather than the body panels. Modular and segmented constructions pertain to assembling vehicles or components in a specific way but do not emphasize the interconnected support found in unibody designs.