Unlike hierarchical diffusion contagious diffusion (2 points)
a. spreads from urban areas to rural areas
b. originates from a center of power
c. has a group impact across socioeconomic groups
d. involves the spread of ideas
e. spreads slowly over a long period of time

Which occurs when air is compressed? air molecules move slower. air temperature rises and air molecules move faster. air temperature decreases. air temperature decreases and air molecules move faster.

The largest internal organ in the frog is the

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.