11.D→slash-and-burn farming

12.B→an ethnic

13.D→northern

14.A→Young

15.B→to preserve

16. Dressing well is important in South Korea; it is considered a sign of respectful -> respect.

17. In India, you shouldn't -> should never use your left hand to eat because it's considered disrespectful.

18. He asked me anxiously what he has -> had to do when visiting a Vietnamese home.

19.Ma La => the Ma La