Which option best describes a "live" axle?

The description of a "live" axle is accurately represented by the option stating that the axle shaft transmits torque to the wheels. A live axle is one that is connected to its wheels and is responsible for transferring power from the vehicle's drivetrain to the wheels. This means that when the vehicle moves, the axle rotates and effectively drives the wheels, allowing for propulsion.

In this context, torque refers to the rotational force that is necessary for the vehicle to move forward. A live axle enables synchronized movement of the wheels, thereby enhancing traction and stability during acceleration. This fundamental characteristic of live axles is particularly important in various vehicle designs, ranging from traditional rear-wheel drive to four-wheel drive systems, where the coordinated effort of multiple wheels is crucial for effective handling and performance.

The other options do not accurately capture the essence of a live axle. For instance, suggesting that the axle shaft transfers power to the engine misrepresents the function of the axle, as it is the drivetrain components like the driveshaft that connect to the engine, while the live axle specifically facilitates the connection between the engine's power output and the wheel rotation. The idea that the axle does not rotate while the vehicle is in motion is inherently contradictory to the function of a live axle, as