Answer:
To understand the past culture of African people.
Step-by-step explanation:
It is necessary to learn and protect the remaining ancient cities such as Aksum and Great Zimbabwe of Africa because they tell us about their past through their remaining artefacts in sites. Ancient cities tell us about their culture, farming techniques, and society, along with the economy (trade, metal). Cities of Africa helps us to understand their importance in history. It is crucial to protect ancient cities sites for the future generation to learn about their past.