Every weekend in summer, large numbers of people leave the hot desert climate of phoenix to head for vacations in the cooler climates of northern arizona. this is an example of
a. permanent migration
b. cyclic movement
c. intervening opportunities
d. commuting

Chris lives in a city that experiences heavy rainfall with average annual precipitation of 882 millimeters. it is warm all year.mark lives in city with an average annual rainfall of 40 millimeters. it has hot summers and cool winters.chris's city is in a climate, while mark's city is in a climate.