Watch out for NoblePenguin he keeps deleteing questions and answers, SPREAD THE WORD I dident know what to call it... :(

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.

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa