Question

demography refers to
a the science of population changes.
b constitutional rules governing reapportionment of congress.
c the science of democracy.
d the science of public opinion.
e the u.s. census planning process.

Explanation:

Demography is defined as the study of human populations, including their size, growth, density, distribution, and other characteristics. Option a states "the science of population changes," which aligns with the definition of demography. Option b is about congressional reapportionment rules, not demography. Option c (science of democracy) is political science - related to democracy, not population. Option d (science of public opinion) is about public opinion research, not population. Option e (U.S. census planning) is a part of data collection for demography but not the definition of demography itself.

Answer:

a. the science of population changes.