Answer:
To seclude and divide from another country or area.
Explanation:
Rivers, mountain ranges, oceans, and deserts can all serve as physical boundaries. Many times, political boundaries between countries or states form along physical boundaries. For example, the boundary between France and Spain follows the peaks of the Pyrenees Mountains, while the Alps separate France from Italy.
He could post them on social media such as twitter and facebook. it would be better because so many people use social media outputs.
I believe the answer is B
