Answer:
B. grotto
Step-by-step explanation:
adobe = a kind of clay used as a building material, typically in the form of sun-dried bricks
oracle = a priest or priestess acting as a medium through whom advice or prophecy was sought from the gods in classical antiquity
stucco = fine plaster used for coating wall surfaces or molding into architectural decorations
grotto = a small picturesque cave, especially an artificial one in a park or garden
"The Tang Dynasty is famous for its grotto art, in which caves are decorated with religious images, small pagodas, and inscriptions."