gulf coastal plain
southwestern region
east texas
south
South Texas.
south texas
In the South west region
south west
South or southwest region depending on the context of the question
south of Texas because closest to Mexico. i think
There are various definitions of the four regions of Texas. El Paso is in the Mountains and Basins region or the Basin and Range region or the Trans-Pecos region or the Fort Bend region, and maybe more.
The answer is Texas.
The answer is Texas.