Most data used by demographers comes from:

a. the u. s. geological survey.

b. censuses.

c. interviews.

d. phone directories.

The right answer is B

Explanation:

Because censuses are a set of operations that consist of collecting, manufacturing and publishing demographic data.

Data from the U.S. geological survey and Censuses are mostly used by demographers as a source to create statistics and records.

Explanation:

Demographers are federal people who study the trends, distribution, and makeup of the population of a certain country. They collect statistical data and information and analyze them.

These data are a part of an incorporated program of statistical information gathering and accumulation, and together, they give a comprehensive and vital source of data for development planning, population count, and age group identification, formulation of policies, administrative reasons, various researches, and other uses.

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.