All of the following climate regions are located in East Asia except the __________ region.

East Asia includes humid subtropical areas in southern China, highland climates in mountainous regions, and semiarid areas in parts of northern China and Mongolia. Tropical wet-and-dry climates are generally associated with regions farther south, such as parts of Southeast Asia, rather than East Asia. Therefore, the exception is the tropical wet-and-dry region.

AI-written and checked against the verified answer.