The study of the size, composition, growth, and distribution of human populations isGroup of answer choicesurban sociologydemographygeographyethnography

The study of the size, composition, growth, and distribution of human populations is known as demography.

Demography is a field of study that focuses on statistical data related to human populations, such as birth rates, death rates, migration patterns, and overall population dynamics. It analyzes how populations change over time and how these changes affect social, economic, and political structures.

In contrast, urban sociology examines social structures in urban environments; geography focuses on the physical features of the earth and human interaction with these features, while ethnography involves the systematic study of people and cultures in their natural environment. Hence, among the options provided, demography is the most accurate choice for describing the focus on human population characteristics.