What technique is used to fix the end of the rope so that the strands do not unravel?

The technique used to fix the end of the rope to prevent the strands from unraveling is known as whipping. This involves wrapping a small piece of twine or fine rope around the end of the main rope several times. The purpose of this action is to create a secure binding that holds the strands together, thereby preventing them from coming apart over time, which can happen due to wear or the tension experienced during use.

Whipping is commonly used in various applications where ropes are subject to frequent movement or strain, as it not only secures the threads but also helps maintain the integrity and usability of the rope. This technique is particularly beneficial in situations where cutting the rope can lead to fraying or unraveling, ensuring that the performance and reliability of the rope are maintained.

In contrast, the other techniques mentioned do not specifically address the prevention of unraveling at the end of a rope. For example, the long lay refers to the construction of a rope's strands rather than an end treatment, while a U bolt is a type of fastener and clipping typically refers to connecting equipment rather than finishing rope ends.