Final answer:
The region with the Stockyards, Bell Helicopter, Texas Rangers, and associated with Selena Gomez is Texas, USA, which falls within the American Southwest known for its diverse economy and agricultural and cattle ranching history.
Step-by-step explanation:
The region known for the Stockyards, the Cross Timbers sub-region, its sub-tropical climate, the TX Fort Trail, Bell Helicopter, vineyards, the Texas Rangers, Lockheed Martin, Abilene, and Selena Gomez is Texas, USA. Specifically, these attributes are associated with the American Southwest and central part of Texas, which has a diverse economy and a rich history in agriculture and cattle ranching. Eastern Texas benefits from more rainfall due to the Gulf of Mexico, which affects its agricultural productivity, while the west-central regions are more arid and suited for cattle ranching, as noted with the famous cattle drives to cowtowns like Abilene and the Stockyards.