A megalith is a large stone that has been used to construct a structure or monument, either alone or together with other stones. The word megalithicdescribes structures made of suchlarge stones without the use of mortar or concrete, representing periods of prehistory characterised by such constructions.
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 completion of the first transcontinental railroad in 1869 encouraged settlement of the American west by proving easier travel and it took less time.
