Final answer:
The third level of analysis in the OB model after individual and organizational is 'group'. This level studies interactions and behaviors within groups in an organization.
Step-by-step explanation:
The three levels of analysis presented in the Organizational Behavior (OB) model are individual, organizational, and group. This third level of analysis focuses on how individuals behave and interact in a collective setting, including the dynamics of teamwork, communication, and leadership within organizations.
Each of these levels provides a different lens through which to view and understand behavior within organizations, ranging from the actions of single individuals to the complexities of group interactions and finally, to the structure and culture of the organization itself.