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According to the text, which U. S. ethnic population is declining, relative to other ethnic populations? Hispanic Asian-American Caucasian African-American

Caucasian African-American is declining, relative to other ethnic populations.

Explanation:

The Caucasian race comprises ancient and modern people in Europe, Western Asia, Central Asia, Southern Asia, Northern Africa, and the African Horn and has traditionally been recognized as a biological taxon based on which traditional definition is used.

Race and ethnicity from the US Census are also the data articles on self-identification of the species or race with which they associate most closely and specifying that they originated in the Hispanic or the Latin language (the only groups for ethnicity) identified by the Federal Leasing office and the U. S. Survey Bureau.

The racial categories reflect a socio-political structure for the race or races that respondents perceive to be "generally socially established in this country as the accepted race."