According to demographers, zero population growth occurs during the process of demographic transition when
the crude birth and death rates are simultaneously low.
the crude birth and death rates begin to increase rapidly.
the crude death rate is higher than the crude birthrate.
the total fertility rate falls below the crude birthrate.
the total fertility rate rises above the crude death rate.

Air masses are characterized by various properties including temperature humidity air pressure and wind speed. which of the following air masses is associated with low relative humidity and high air temperature ?

Stages 1 and 4 of the demographic transition are similar in that

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor.b. increased mechanization has increased the need for water, thereby increasing the need for labor.increased mechanization has increased the use of land, thereby increasing the need for labor.d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.