Under modernization, urbanization is particularly marked by:​

A) ​the movement of population from rural to urban areas
B) ​the development of densely populated internal migrations within cities
C) ​the migration of transnationals from one to another urban area
D) ​the concentration of production within urban areas

Under modernization, urbanization is particularly marked by the movement of population from rural to urban areas. This is because modernization brings economic development and opportunities that are more concentrated in urban areas, leading to rural residents moving to cities in search of better jobs and living standards.