What function does a slip leash serve?

A slip leash is specifically designed to momentarily tighten around an animal's neck when it is pulled. This feature allows for better control over the animal, making it easier for handlers to guide or restrain them without needing to apply excessive force. The tightening mechanism of the slip leash ensures that it remains secure while allowing for quick adjustments based on the animal's movements, which is particularly useful in situations where an animal might become agitated or tries to escape.

The other options do not accurately represent the primary function of a slip leash. For instance, while support during lifting is important for handling animals, a slip leash is not constructed for that purpose. Similarly, while some leashes may aid in training, a slip leash's primary role is restraint and control rather than direct training methodologies. It's important to understand that while slip leashes can be used in various contexts, their design specifically caters to the need for temporary and adjustable restraint.