What major agricultural enterprise become vital to the settlement of the southern great plains why was it important

Cattle ranching is the major agricultural enterprise that became vital to the settlement of the southern great plains. Because of the vast plains in the south, settlers thought of building ranches. In cattle ranching, cattles were raised a ranch which yields meat and wool. 

Explanation:

This was significant because it provided pioneers with money and food. Since the population was getting there was a market for food and cattle ranching captured this demand. The vast plains presented the food wanted for the cattle's. The shepherds sold the cattle meats and other commodities to improve themselves financially.

just like you man, i personally think its either c or d

explanation:

but good luck with the test man

c. troops marched forward in close formation against newer, more accurate weapons