What are natural and physical boarders?

Natural border is something that separates countries or states.

Physical border is something that separates countries or states.

Explanation:

Natural border: Rivers, mountain ranges, oceans, and deserts can all serve as physical boundaries. Many times, political boundaries between countries or states form along physical boundaries.

Physical border: Physical boundaries include oceans, cliffs, or valleys.

Natural and Physical borders are basically the same thing they are both not man made and can be used for political reasons.

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