How are reasons for moving today's world different from people in ancient time?

Explanation:

In ancient times, people moved because of a lack of resources. Important facilities that allowed for survival were not available. They had to keep moving to fulfill basic needs and for safety. The need to move in today's world is much less dire. People move because they need a change of surroundings or for better opportunities. In the modern world, people generally don't move for matters of survival.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.