Why is it important to use safety chains with towed vehicles?

Using safety chains with towed vehicles is crucial because they provide an additional layer of security that prevents the towed vehicle from becoming detached in the event of a hitch failure or other issues. If the primary hitch fails, safety chains act as a backup, keeping the towed vehicle connected to the towing vehicle and minimizing the risk of accidents. This added safety measure is especially important considering the potential hazards posed by a detached vehicle on the road, such as collisions and property damage.

The other options do not relate to the core function of safety chains. Aesthetic appeal, towing speeds, and vehicle weight do not contribute to the fundamental safety and security concerns addressed by the use of safety chains. Thus, the primary purpose of safety chains is to enhance safety and ensure that the towing arrangement remains intact, making the correct choice about their importance clear.