Multiple choice Why did East Africans start migrating to the Sahara around 100,00 years ago? They needed more farmland An Ice age had begun in East Africa The Sahara had turned into an oasis They wanted to move closer to the ocean Reveal answer Fill a bubble to check yourself C Correct answer Explanation Around 100,000 years ago, monsoon patterns shifted, bringing heavy rainfall to North Africa. This transformed the modern-day Sahara desert into a lush, green grassland with lakes and rivers, drawing human populations to migrate there.