Answer:
Weapons
Step-by-step explanation:
In the United States, the industry that was used as an example of protecting national security is Weapons.
The United States government make use of strategic industries for each of the economic sector, by ensuring that they serve the interest of the American people.
The US governme provide protections for each of the strategic industires and her citizens by making use of national security industry. Weapons is part of the national security industry because it produces the weaponry, airplanes, tanks, and technology to defend the United States.
Weapons industry also serves as a good trade industry that exports weapons to other countries, generating an important income for the US and creates thousands of jobs.