Final answer:
The common form of agonistic display for baboons is vocalizations, which serves as a way to assert dominance and prevent actual physical conflict by allowing baboons to assess one another's fighting capabilities.
Step-by-step explanation:
Which of the following is a common form of agonistic display for baboons? When baboons engage in agonistic behaviors, which are actions connected to social aggression or conflict, they often perform specific displays to assert dominance, establish hierarchies, or deter other baboons. Among the options provided—vocalizations, tail grooming, dancing, and hugging—the most common form of agonistic display for baboons is vocalizations. These vocal displays, along with other physical actions like baring teeth or charging, work as a mechanism to reduce the actual amount of fighting between members of the same species by allowing individuals to assess each other's willingness and ability to fight without risking injury from physical conflict.