Rivers, mountain ranges, historical points (railway, a wall, etc.)
Most country borders are divided by geographical points, and sometime just for political and historical reasons (what belonged, and waht should belong to whom).
You could collaborate effectively to prepare for final exams by thoroughly understanding the exams material. There are various methods that you could do to understand the exams material thoroughly<span>. The most effective way is to organize a study group. This provides an exchange of understanding between you and your study partner.</span>
