What term is used to refer to the northernmost region of the nile river, which is roughly shaped like a triangle?

The Nile River Delta. It's called that because of its resemblance to the Greek letter delta and the letter looks like a triangle.

Mexico and other Lat.in American countries

Explanation:

More than half of the immigrants have originated form the developing countries as they leave due to desperate social and the economic circumstances. The largest group is formed by the Poland, Pakistan and Sweden and Germany Lithuania and the Vietnam. The act was called as Hart-Celler