What does body rigidity refer to in vehicles?

Body rigidity in vehicles refers to the structure of a vehicle resisting bending under pressure. This characteristic is crucial for maintaining the integrity of the vehicle's frame and ensures stability during various driving conditions, including cornering and sudden maneuvers. A rigid body allows for better handling and performance, as it reduces flex and distortion, especially when the vehicle encounters stress from road imperfections or sharp turns.

In contrast, the other choices address different aspects of vehicle characteristics. The acceleration capability pertains to the engine and drivetrain performance rather than structural integrity. Sound absorption is related to materials used within the vehicle rather than its frame rigidity. Lastly, tire pressure flexibility focuses on the tires themselves and how they can adapt to different conditions, which does not directly relate to the rigidity of the vehicle's body.