The main cause is poverty and lack of education. They're very poor, so they can't afford school. If the children do go to school, they drop out very young to work and help earn money for the family. That's not the kind of cycle people can break out of easily.
Add to that the civil war from 1960 to 1996 where the military persecuted the native people, killing up to 200,000, and they've had a pretty rough time of it.
Answer:
the answer is number 3 ur welcome
Smell:spices
See:new people animals and land
Taste:new food
Hear:animals
The correct answer to this open question is the following.
I think the border dispute would have been resolved if the American army had not crossed the Nueces River into the disputed land through the diplomatic via, although the issue was "hot" and there was not a good predisposition of México and the United States to resolve it in an amicable way.
The federal government of México defended its idea that the natural border with the United States was the Nueces River, in Texas. However, the United States had a different idea and the US government defend its idea that the border was the Río Grande. And that is how the problem became bigger and bigger until it ended up in the war between México and the United States.