Moving toward the southwestern border of the united states, spanish is increasingly spoken in addition to english. what type of region does this gradual change of language reflect?

I think it’s a functional region because of the gradual change of language

1one sharp difficulty presented itself. in the intervening twenty-five years my name had become reasonably well known.2 this being so, my trip demanded that i leave my name and my identity at home.3 i had to go alone and i had to be self-contained, a kind of casual turtle carrying his house on his back.4 with all this in mind i wrote to the head office of a great corporation which manufactures trucks.

Based on what was seen on the opening page of the chapter, answer in your notebook what relationship exists between the current i didn't see the qustion.