Respuesta :
Answer:
b. department of homeland security.
Explanation:
Homeland Security is the main department of the U.S. government whose objective is to deter terrorist attacks. Homeland Security is a Cabinet-level agency whose roots lie in the nation's reaction to the attacks of 11 September 2001, when members of the al-Qaeda terrorist organization boarded and deliberately crashed commercial airliners of the United States into the World Trade Center Towers.