The reason the Department of Homeland Security was created was to protect the United States from terrorist attacks.
The Department of Homeland Security was created for the main purpose of preventing terrorist attacks on the U.S. and therefore protecting Americans from harm.
It was formed after the dangerous and tragic events of 9/11 which saw the U.S. attacked by terrorists.
In conclusion, option B is correct.
Find out more on Homeland Security at brainly.com/question/730446.