Hey You!
The two most important questions geographers ask are A. Where? . . . Why There?
Yes, this is especially true during World War Two when people like ethnic Germans now living in Poland were persecuted after the country capitulated to Germany. Another example is the Bosnian war where countless people were attacked from either side and based of their nationality, despite sharing ethnicities.
Answer:
All of us know that the earth is rotating continuously in its orbit. But we dont realize the rotation due to gravitational force. The earth rotates in its own axis this causes day and night . While rotating on its axis, earth also rotates around elliptical axis around the sun which causes the different regions to experience different seasons. The side facing the sun experience summer and other side experience winter.