The organizational structure of the U. S. Army's 1st Infantry Division provides for direct two-way lines of responsibility, authority, and communication running from the top to the bottom. Additionally, each person in the division reports to only one superior. The 1st Infantry Division is clearly an example of a(n):

Line organization

Explanation: Line organization could be referred to a work flow of authority or command within an organization. It depicts the chain of command adopted by an organization usually styled from top to bottom. The organizational structure in line organization is easy to understand with each member directly answerable to the individual above them. Shortcomings of these kind of organization include lack of specialization as employees are only concerned with task pertaining to their department.