Which of the following is a characteristic of primates?

Among the characteristics associated with primates, having flexible spines and prehensile hands is particularly important. Primates, which include lemurs, monkeys, and apes, are known for their adaptable skeletal structures that allow for a wide range of motion. A flexible spine enables them to navigate various environments effectively, climbing and swinging through trees with agility.

Furthermore, prehensile hands are a defining trait of many primate species. These hands have evolved to possess a remarkable level of dexterity, allowing primates to grasp, manipulate, and interact with objects in their environment effectively. This adaptation is crucial for activities such as foraging for food and using tools, which are significant aspects of primate behavior.

While hollow bones are generally associated with birds to aid in flight, primates do not share this characteristic. Similarly, although many mammals have variations in ear structure, the presence of three bones in the middle ear is not exclusive to primates. The ability to fly is a characteristic found in birds and bats, not in primates. Therefore, the combination of a flexible spine and prehensile hands accurately reflects the unique adaptations that characterize the primate lineage.