The second definition refers to the organization's behavior. Department of Education is trying to find the impact of individual Groups, and structure on behavior within organizations.
The second definition, the meaning attributed to the behaviour that it is one of the disciplines that are attempting to learn the impact that search occurred from a group of people and behavior within the organization.
The second behavior is defined, meaning that the organization is one of the subjects to study search for impact from people, groups, and structure have on behavior within the organization.