Which of the following best describes Alfred Weber's analysis of location decisions?​

What did the pattern of earthquakes in the wadati-benioff seafloor zones show scientists? a.) earthquakes occur where the ocean floor reaches its highest temperatures. b.) many earthquakes take place 700 kilometers below the seafloor. c.) slabs of ocean floor return to the mantle in subduction zones. d.) ocean - trenches cause earthquakes.

Can someone me with this plz? ! i'm putting 20 points on it!

Which of the following is an environmental cost of agriculture? a. agronomyb. cash cropsc. pollutiond. crop rotation