The development of natural landscapes is best explained by which of the following choices? A. Landscape uplift is an ongoing process to which erosional processes are constantly adjusting. B. Landscape uplift occurs slowly due to plate tectonic processes while erosional processes work much more rapidly. C. Mountain are rapidly built by plate tectonic processes, then slowly worn down by erosion. D. There is no known relationship between landscape uplift and erosional processes.

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.