The correct answer is "A bird that Sam has as a pet." This is because a falcon is a type of bird that can be kept as a pet. Falcons are known for their sharp beaks and talons, as well as their ability to fly at high speeds and catch prey. They are often used in falconry, a sport where trained falcons are used to hunt small game. So, in this context, a falcon refers to a bird that Sam owns as a pet.