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.
The reconstruction
The most difficult task confronting many Southerners during Reconstruction was devising a new system of labor to replace the shattered world of slavery. The economic lives of planters, former slaves, and nonslaveholding whites, were transformed after the Civil War.