Which is true about rear-wheel drive vehicles?

In the context of rear-wheel drive vehicles, the correct statement emphasizes the use of a driveshaft with universal joints for power transfer. In these vehicles, the engine sends power to the rear wheels via the transmission, which is connected to the rear axle by a driveshaft. This driveshaft is essential for coupling the transmission to the rear axle, allowing for the effective transfer of power. Universal joints are used in the driveshaft assembly to accommodate the movement between the components, especially during vehicle motion and suspension travel.

The functionality of the driveshaft is critical because it not only transmits power but also allows for flexibility as the vehicle navigates roads and terrain. A half shaft is more commonly associated with front-wheel drive or all-wheel drive configurations, where it connects directly to the wheels, rather than functioning in the context of a driveshaft in a rear-wheel drive setup.

The mention of off-road capabilities does not specifically apply to all rear-wheel drive vehicles, as many are primarily designed for on-road performance. Additionally, rear-wheel drive vehicles indeed have a direct connection to the transmission for power transfer through the driveshaft, making that statement inaccurate in the context of this question.