The origins of physical anthropology arose from which two areas of interest among nineteenth-century scholars?

The correct answer is - the origins of modern species and human variation.

Explanation:

Physical anthropology is the branch of the anthropology that is based on study or work on 3 main groups of fields that are human variation and its significance, evolution of human and nonhuman primates and the biological bases of human behavior.

It is broadly concerned with the origin of various modern species of humans or primates and human variation including their race among the early scholar of the 19th century.

Thus, the correct answer is - the origins of modern species and human variation.