The most likely reason today's population is going in certain areas or countries is because ...

A) land and resources are available b) people are leaving rural areas and moving to urban areas c) people are emigrating from war-torn areas to peaceful areas d) government policies is favorable.

the answer is people are leaving rural areas and moving to urban areas

Option B, people are leaving rural areas and moving to urban areas

Urbanization is increasing at a very fast pace and it is believed that nearly 50 % of worlds population will live in urban areas by 2050.

The most probable reason of migration from rural to urban areas is the availability of employment opportunities in the city, better life style and infrastructure facilities that one can avail in an urban area.