What of the following is an example of architecture adapted to the needs of the environment in which it's built?

A. In Italy, the Villa Rotonda's dome symbolizes the heavenly sphere.
B. In Indonesia, the steep pitch to a house roof protects the thatch from the heavy rains.
C. In Pennsylvania, Fallingwater's walls are built in part from locally quarried stones.
D. In Mali, Dogon villages have horizontal beams that are both functional and aesthetically pleasing.

Answer: B