What is the relative abundance of oxygen in the atmosphere

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.

Following the new zealand wars, the british government

These issues present challenges for regional urban areas. select all that apply. -housing availability -inadequate services -pollution -reduced population -rural migration