Which of the following regions would be least likely to use terrace farming to maximize available land for farming?
i. midwest united states
ii. northeastern china
iii. sierra region of ecuador and peru
iv. sri lanka

a. i and ii
b. i and iii
c. ii and iii
d. ii and iv
e. iii and iv

A. I and II

Explanation:

The northeastern china has something called the North East Plains which are a huge portion of plains that land inbetween rivers and mountains, so having plains it would make no sense to have terrace farming, as well as in the midwest of the United States which is basically covered by the great plains, which are endless lands of plain soil. This two regions would be least likely to use terrace farming since they are plains.

the boundarys like convergent divergent and transform it causes subduction