Answer:
A more developed transport network in Africa would attract more settlement to those areas closer to the new transportation hubs.
Step-by-step explanation:
Anywhere where new roads, railroads, or airpots were built, would likely receive more migration, and also more investment, creating a virtous cycle where people move to area seeking jobs, firms move to the same area seeking workers, and the two feed each other in a positive feedback loop.
This is why building more transport infraestructure in Africa is so important, and why it is undoubtedly one of the best strategies to increase development in the continent.