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

Respuesta :

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