Question

national security policies are defined by ______ in response to current events, changes in leadership and the needs of the nation.
○ the president
○ congress
○ amending the constitution
○ the department of defense

Explanation:

In the context of U.S. national security policy, the President, as the head of state and commander - in - chief, is responsible for defining national security policies in response to current events, changes in leadership, and the nation's needs. Congress has a role in oversight and funding but not the primary role of defining these policies on a day - to - day or responsive basis. Amending the Constitution is a very rare and long - term process not related to regular national security policy definition. The Department of Defense implements security policies rather than defining them at the strategic level.

Answer:

the President