The demographics of an area can include all of the following except: a. ethnic origins b. education levels c. income levels d. the age of buildings in the region

  D. The age of buildings in the region.

Explanation:

 Demography is the statistical study of populations, especially applied to human beings.

  It studies quantifiable characteristics of a living population through different criteria like ethnicity, education, nationality, and religion. It is usually treated as a field of sociology. There is a particular field into demography called social demography that also analyses the relationship between economic, social, cultural and biological processes.

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