Which of the following factors least explains the fast growing population in Africa?

The factor that least explains the fast growing population in Africa is the improvement in transportation. While all of the listed factors can contribute to population growth, they have varying levels of impact. For example, control of diseases and the decline in death rate play a significant role in increasing the population by reducing mortality rates. The education of women, especially in regards to family planning and reproductive health, can also help slow down population growth. The provision of more hospitals can improve access to healthcare, which can also contribute to population growth. However, while transportation is important for economic development and access to goods and services, it is not as directly related to population growth as the other listed factors.