One reason birth and fertility rates in more-developed countries tend to be lower is that

a.
pollution has drastically decreased fertility in these countries

b.
infant mortality is higher

c.
the cost of raising and educating children is much higher

d.
marriage is much less common

e.
all of these countries have restrictions on the number of children a couple can have

What does a movement along the demand curve show

What is the general rule about surface currents? cold water flows along the ocean floor towards the equator. the east coasts of continents have cold surface currents, and the west coasts of continents have warm surface currents. seasonal and constant offshore winds create significant upwelling along the west coasts of south and north america and africa. the west coasts of continents have cold surface currents, and the east coasts of continents have warm surface currents.

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.