What did the open ranges of Texas, Colorado, and Wyoming become

important areas for? apex

a. cattle ranching

b cotton production

c gold mining

d industry

a. cattle ranching.

Explanation:

Cattle ranching is the practice of raising grazing livestock like cattle, sheep, meat, or wool. This was a principal activity in the great plains, including Texas, Colorado and Wyoming. That zone is the largest cattle raising in the Nation.

Answer:cattle ranching