Final answer:
Climate change and Berber groups were the main causes of the end of the Sundanic state of West Africa.
Step-by-step explanation:
The end of the Sundanic state of West Africa can be attributed to a combination of climate change and Berber groups.
Climate change, particularly in the form of droughts, disrupted the agricultural practices of the Sundanic societies, leading to food shortages and economic decline. This weakened their political power and stability.
At the same time, Berber groups, who were involved in trans-Saharan trade, conducted raids and invasions in West Africa, further destabilizing the Sundanic state and contributing to its collapse.