Why are the average temperatures in the middle of the United States warmer than the coasts?

The earth's internal process which drives seafloor spreading is

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.

Quiero una redaccion de yo soy medico y que tenga 10 lineas