Why is the upper part of the Civic's trunk not enclosed?

[VanAriel]

The upper part of the Civic's trunk is not enclosed because this is the factory design setting for this model. Trunk load capacity: Generally, small cars are designed with a trunk load capacity that should not exceed 250 to 300 kg. It is not advisable to carry excessively heavy items in a sedan, as it can adversely affect the chassis and suspension system. Springs and shock absorbers are prone to fatigue and aging, and the chassis and frame may deform. Avoid loading items to the point where the rear of the car sags. As long as these guidelines are followed, there should generally be no issues. Precautions for storing items in the trunk: Flammable and explosive items, which can pose a danger, should not be stored in the trunk. Do not use the trunk as a safe for valuables, as they can easily be lost. It is also best not to place pets in the trunk, as the enclosed space lacks ventilation and can lead to suffocation. Food and beverages should not be stored in the trunk for extended periods. While short-term storage is acceptable, the temperature inside the trunk can rise during driving, accelerating food spoilage and decay, and creating odors that are difficult to eliminate.