Describe the physical properties (thickness, composition, and state) of each of the six layers of earth including the asthenosphere and lithosphere.

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.

Democratic vs democratic whats the difference? ?

According to speculation and study, what will happen to the global birth rate in about 40 years? (1 point)