The correct answer is: a) Determines who is counted in a particular area.
A “Usual Resident” is a person who lives and sleeps in a particular housing unit most of the time. This definition is important for the Census because it helps to ensure that everyone is counted only once, and that the data collected is accurate.
Option b) is incorrect because the concept of a “Usual Resident” does not reduce duplication. In fact, it can actually increase duplication, as people who live in multiple places may be counted in both places.
Option c) is incorrect because the concept of a “Usual Resident” does not identify seasonal migrants. Seasonal migrants are people who move to a different location for a specific period of time, such as for work or school. They are not considered “Usual Residents” of the place they are living in temporarily.
Option d) is incorrect because the concept of a “Usual Resident” does not track population movement. Population movement is the change in the number of people living in a particular area. The Census does track population movement, but it does so using different methods.