What best describes a "slip" in falconry?

A "slip" in falconry refers to the moment a bird of prey is released to chase after its quarry. This term encompasses several aspects of the hunting process. It involves not only the action of releasing the bird but also the resultant behavior of the bird as it actively pursues its target.

In the context of the options provided, a "slip" can be understood as a chance at quarry because it is the opportunity presented to the falcon to engage in hunting. It also describes the release of a short wing (a smaller bird of prey) that is trained to hunt, indicating the moment the bird begins its pursuit. Moreover, it includes the flight of the short wing as it actively chases after the quarry.

Thus, all these elements—making it a chance to hunt, the act of release, and the subsequent flight—are components of what a "slip" entails in falconry. Hence, the comprehensive nature of the definition justifies the selection of the option that encapsulates all aspects.