Why do you think Texas wanted the border at the Rio Grande River?

Explanation:

Before they made the Rio Grande the border the river shifted so much that it confused each side where was Mexico and where was The States. So now they just go off of the Rio Grande.

Since 1848, the Rio Grande has marked the boundary between Mexico and the United States from the twin cities of El Paso, Texas, and Ciudad Juárez, Chihuahua, to the Gulf of Mexico. As such, crossing the river was the escape route used by some Texan slaves to seek freedom.

Explanation:

australian plates collided into eurasian plates, and the himalayas formed. the andes mountain range the himalayas and the islands of japan form differently. the andes mountain range formed at the convergent boundary of an oceanic plate and continental plate.