Why is the rate of natural increase greater in less developed countries that in more developed countries?

The rate of natural increase is typically greater in less developed countries due to higher birth rates and lower mortality rates. These nations often have limited access to family planning, education, and healthcare, leading to larger families. In contrast, more developed countries tend to have lower birth rates because of greater access to education, economic opportunities, and healthcare, which encourage smaller family sizes and delayed childbirth. Consequently, the demographic transition in developed countries results in slower population growth compared to their less developed counterparts.