Final answer:
Musk oxen exhibit cooperative behavior by forming a circle around their offspring to protect them, reflecting a social strategy that improves the survival of the young by pooling the group's defensive efforts.
Step-by-step explanation:
The behavior in question is an example of cooperative behavior, where musk oxen work together to protect their offspring from predators. This type of social behavior ensures that the young are safeguarded, increasing their chances of survival and future reproduction. This behavior is crucial for many group-living species as it enhances overall fitness and successful rearing of the next generation.
In the context of the musk oxen, the adult members of the group form a circle around the young, presenting a united front against potential threats. This strategy is also seen in other species where group living is advantageous for survival, as cooperation can lead to greater defense capabilities than what an individual can achieve alone.