Explain why the phenomenon called global warming is more accurately described as climate change.  pl need

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.

Can someone me? i need to have this done as soon as possible! i'm putting 20 points on this!

The ozone hole is at its biggest each year in the ? hemisphere in the ? season.