Final answer:
Africa is the region of the world that will most likely experience the majority of the population growth by 2050.
Step-by-step explanation:
If current population trends continue, the region of the world that will most likely experience the majority of the growth by the year 2050 is Africa.
According to the provided information, Africa has the highest fertility rates in the world, and countries such as Nigeria are experiencing rapid population growth. Developing countries in Africa, combined with factors like poverty and political instability, contribute to the high population growth rate in this region.
Therefore, based on the information provided, Africa is the region that is most likely to experience the majority of the population growth by 2050.