What is the purpose of blocking the wheels of a trailer that will be left for any length of time?

Blocking the wheels of a trailer that will be left unattended serves the critical purpose of preventing the trailer from rolling. This is particularly important when the trailer is parked on an incline or uneven surface, where gravity could cause it to move unexpectedly. By placing blocks or chocks against the wheels, you create a physical barrier that keeps the trailer stationary.

While stability is important and could be related to the overall safety of a parked trailer, the primary function of blocking the wheels is to directly stop any potential movement. Additionally, other options relate to different considerations; protecting the tires and ensuring quick reconnecting do not directly address the immediate safety concern of a trailer rolling away. Therefore, preventing the trailer from rolling is the most relevant and essential reason for using wheel blocks.