How might you use hard candy to model how magma forms new rock?

I’m a process called plucking, the rocks dragged by glaciers produce grooves and scratches in bedrock.

How would i answer this for an exam?

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.