What aspect of a vehicle does unibody construction enhance?

Unibody construction is a design technique where the vehicle's body and frame are combined into a single piece. This enhances several aspects of the vehicle, notably weight reduction and enclosed trunk space.

The weight reduction occurs because the unibody design eliminates the need for a separate frame, allowing for a lighter overall structure without sacrificing strength. This reduction in weight improves fuel efficiency and vehicle performance.

In addition to weight reduction, unibody construction optimizes enclosed trunk space. Since the design integrates the body and frame, it allows for more efficient use of interior space, including the trunk area, compared to traditional body-on-frame vehicles where the separate frame can limit the design and cargo capacity.

Therefore, the correct answer emphasizes that both weight reduction and enhanced enclosed trunk space are significant advantages of unibody construction, making it an effective and practical choice in modern automotive design.