Help me finish this environment science practice exam, time is 8th Apri 7:00-7:50am ( China Beijing time)

I could provide the lectures notes for you to review). totally 3 questions , u only need choose any 2 finish

https://drive.google.com/drive/folders/1qFWNmrkBEi…

there are 3 questions , u only need choose any 2 to finish