What led to the diffusion of agricultural techniques from the Sahel region to other parts of Africa around 2000 BCE?

Question

Quizplus · Accepted Answer

The Sahel region experienced a period of increased rainfall and warmer temperatures around 2000 BCE, leading to the spread of agricultural techniques to other parts of Africa. As a result, the region became more hospitable to crops and populations grew, leading to the diffusion of these techniques to other areas.

What Led to the Diffusion of Agricultural Techniques from the Sahel