Physical boundaries and armed protection are used at federal boundaries
Federal boundaries separates countries, states, provinces, cities and towns. US Federal Government uses armed protection at boundaries to make sure safety of citizen.
Physical boundary is naturally occurring barrier between two or more areas. It includes oceans, valleys, mountains, deserts.
In US some matters relating to state are independent but certain matters like defense of the country are federal matters. Federal Government uses Armed Protection to ensure safety and maintain peace of the country.
Boundaries area are a particular governing body control area. The Government of region can only create and enforce laws to protect people and maintain country peace, safety and sovereignty.
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Answer:
B.
Explanation:
The Federal government uses physical boundries and armed protection to make sure everything runs smoothly, and nothing dangerous gets in or out.
B) continental slope - continental shelf - abyssal plain
C) continental shelf - continental slope - abyssal plain
D) continental shelf - continental slope - mid-ocean ridge