Why was it necessary to form the border patrol?

Because people were crossing. For example mexicans crossing from Mexico without papers  trying to come to the United States.

Hope this helps!!

The United States learned that the revolutionary army was huge. Furthermore, so many Mexicans were crossing the border seeking farming jobs that Mexican farmers had trouble bringing in their own crops. Americans often crossed the border for the purpose of using counterfeit money and smuggling. The border had become an unsafe place as border towns were infested by bandits and drunkards.

the answer is the letter b governor of new mexico territory

the following best describes postwar era writers in their works:

many writers,authors,novelists,poets concentrated more on social art and social writing and stayed away from political writings.