Question

Which of the following is the best example of step migration?
A.
movement from a harsh climate zone to another climate zone
B.
migration from one continent to another
C.
migration from one nation to another
D.
movement from a rural area to a larger town, and then to a metropolis

Answer 1

D, gradually increasing population and size of the area. 

Answer 2

i think the answer is D.
movement from a rural area to a larger town, and then to a metropolis