Which of the following is necessary for a falconer to possess a raptor?

The necessity of having jesses or the materials and equipment to create them is crucial for a falconer to possess a raptor. Jesses are essential components of falconry equipment that are used to secure the raptor to a perch or the falconer's glove. They provide control and safety for both the bird and the handler, allowing for easier handling and management of the raptor during training and when hunting.

The other options, while related to falconry, do not represent the immediate necessities for possessing a raptor in terms of equipment used for training and handling. A flying permit and training course may be required for specific regulations and guidelines, but without proper equipment like jesses, a falconer wouldn't be able to effectively manage the bird. Similarly, personal certification from a master falconer and a breeding license pertains to more advanced aspects of falconry or breeding practices, rather than the initial handling and possession of the raptor itself. Thus, having jesses or the means to make them stands out as a fundamental requirement for safely and effectively working with raptors.