A rio grande

B Gulf of Mexico

C red river

D ogallala aquifer

D

Explanation:

I think the answer should be the Ogalla Aquifer. Ogalla Aquifer runs through the Texas Panhandle, which is a part of the Great Plains.

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

hope this