What type of margin do mountain building produce mountains composed entirely of preexisting crust material?

Why is terracing used in southeast asian agriculture?

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.

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?