Which physical evidence supports the theory that earth's surface has many plates that can move?

1 tropical plant fossils being found in antarctica
2 satellites measuring the movement of continents
3 identical sequence of rock layers in africa and south america
4 trenches formed at a location where two oceanic crusts collide

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.