My best guess is the Rio Grande river because it creates the border between Mexico and Texas.
Answer:
Pyramids were built for religious purposes. The Egyptians were one of the first civilizations to believe in an afterlife. They believed that a second self called the ka lived within every human being. When the physical body expired, the ka enjoyed eternal life.
Explanation:
The thermocline is the name for the layer of the ocean where the temperature drops with depth faster than in other layers, True.
The civil war transform the united states into a stronger nation-state economically, politically, and ideologically when Lincoln united the states under one (the northern) idea of freedom. I hope my answer has come to your help. God bless and have a nice day ahead!