The gravity model describes an inverse relationship between the

A

flows and counter flows of migration

B

step migration and intervening opportunities

C

environmental obstacles and intervening opportunities

D

environmental push and pull factors and cultural push and pull factors

E

volume of migration and the distance between source and destination

Verified Answer :

I believe the answer would be D. environmental push and pull factors and cultural push and pull factors. Hope this helped! :)

Answer:

C-

Explanation

because its right