Mountain ranges most affected early human tribal groups by (1 point) providing them with meeting places keeping them separate most of the time stopping the flow of water from higher elevations serving as places to build cities

the answer is "d"

(context) if you were to travel to the middle east and go into peoples homes there would be like 4 generations in there

(more context) i'm pretty sure in the middle east they take loyalty and family bonds very serious

(last bit of context) i'm also positive that extended families are most commonly found in urban areas