When using a receiver hitch, what is its main function?

The primary function of a receiver hitch is to securely connect a trailer to a vehicle. This connection is vital for towing safely and effectively, as it allows the trailer to be attached in a stable manner, enabling the towed load to be transported without shifting or detaching while in motion. A well-installed receiver hitch helps distribute the weight of the trailer evenly over the vehicle's axles, enhancing stability and control while driving. Proper attachment ensures that both the trailer and the vehicle are aligned correctly, which is crucial for safe towing practices and reducing the risk of accidents on the road.

The other options do not accurately represent the primary purpose of a receiver hitch, focusing instead on unrelated functionalities.