2. Which technological advancement cured a tropical disease? Which of the technological develop-
ments gave European armies an advantage over African armies?

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.

After considering options, a student using the problem-solving process should next

Which types of seismic waves travel through earths interior? select all that apply. a) l waves b) p waves c) s waves