Final answer:
The Middle East has the lowest amount of naturally available freshwater per capita, facing more severe water shortages than Africa.
Step-by-step explanation:
The region with the lowest amount of naturally available freshwater per capita is the Middle East. The Middle East, particularly countries within the Middle East North Africa (MENA) region, experiences extreme water scarcity due to its arid climate and high population concentrations in urban areas.
This scarcity of renewable freshwater resources puts the region at a higher risk of water shortages than Africa.
Despite the vulnerabilities in water supply that sub-Saharan African countries face, particularly with regards to potential future crises from pollution and depletion of natural water resources, the Middle East shows more immediate and severe challenges in water availability.