Which of the following is NOT a factor that causes the distribution of population to vary from one region to another?
A. the amount of arable land
B. the length of the growing season
C. the elevation
D. the amount of rainfall
E. the size of the ecumene
E. the size of the ecumene
The size of the ecumene refers to the portion of the Earth's surface that is suitable for permanent human settlement. The distribution of population may vary within the ecumene due to factors such as arable land, growing season, elevation, and rainfall, but the size of the ecumene itself does not cause variation in population distribution.