Each year, field workers travel from the southwestern united states to eastern washington to harvest apples. this movement is an example of

a.

permanent migration

b.

periodic movement

c.

transhumance

d.

commuting

Answer

periodic movement

Explanation

movement is a natural event that involves a change in the position or location of something. So when the movement is periodic, it recurs over and over the period of time. It is Model which predicts interaction between places on a basis of their population size and distance between them.  The movement involving field workers to travel from the southwestern United States to eastern Washington to harvest apples is an example of periodic movement. This is because it occurs periodically that is at intervals that is during harvesting times only.

b.   jim crow laws were enacted in northern states.