I believe that it is Olmec.
Because it's easier to scale hustle then relative humidity. and high relative humidity and high precipitation rate are the associates. I should know because I grew up in both greater New Orleans, which is subtropical, and the Oklahoma panhandle, which is semi-arid 5% relative humidity or higher is normal in New Orleans. While 6% relative humidity is relatively familiar in the Oklahoma and Texas panhandles.
Foe me, the most one is my country which is Armenia!
A igneous rock called Phanertic.
Answer:
Not 100% sure but I think its the Barail Range. This would affect them by the mountain acting almost like a barrier between them. So they didn't have much interaction.