Which two layers of the atmosphere are responsible for the majority of solar radiation absorption? a. stratosphere and troposphere b. stratosphere and thermosphere c. troposphere and thermosphere d. troposphere and mesosphere

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.