The typical houses in sub-Saharan Africa are () A. caves B. thatched cottages C. tall houses D. ice.

Most of sub-Saharan Africa is located in the tropics. In order to adapt to the local hot climate, the local traditional houses are thatched houses, thick thatched houses can insulate heat, caves are traditional houses on the Loess Plateau, stilts are traditional houses in hot and humid areas, and igloos are traditional houses of Inuit people.

Therefore, choose: B.