Authority in a line organization can be best described as:

Authority in a line organization is best described as definite and absolute because it represents a clear and structured hierarchy where each level has specific responsibilities and powers. In a line organization, authority flows in a direct line from the top of the organization to the bottom, ensuring that there is a clear command structure. This absolute nature of authority means that decisions made at higher levels are expected to be followed by those at lower levels without ambiguity.

Moreover, line organizations are characterized by a straightforward approach to management where the chain of command is strictly observed. This clarity promotes accountability and ensures that each member knows who to report to and what their specific role entails within the organization. Such an established framework is essential in law enforcement agencies to maintain order, efficiency, and discipline among personnel.

In contrast, other descriptions like vague and collaborative or flexible and situational do not align with the structured nature of line organizations. These terms suggest ambiguity or adaptability, which are more characteristic of matrix or team-based organizational structures rather than the definitive hierarchy of line organizations.