In 2008, the U.S. total fertility rate was about 2.09. Sometimes the total fertility rate is expressed as the average number of births that an average group of 1,000 women would be expected to have. In this case, the average number of children that one woman is expected to have is simply multiplied by 1,000.
Answer: They are a Group.
A group in sociology can be defined as a subset of a culture or society. And it can be said that a culture is the arts, customs, lifestyles, background, and habits that characterize a particular society or nation.
A group can be formed by two or more persons as long as they share common interest, values and goals.
Leo, Ryan and Matthew clearly define a group as they are more than two; they share similar values, norms and expectations.