The correct option is
A distinct heavy, moderate and low rainfall regions.
Asia has Distinct heavy moderate and low rainfall region.
Most of eastern China, North Korea, South Korea, and Japan are included in this region which lies entirely north of the Tropic of Cancer. Summers get rainfall, and winters are dry—a definite monsoonal trait. Only Taiwan, and southern islands of Japan including southern half of Honshu, receive rainfall in winter caused by the southeasterly winds which bring rainfall after picking up moisture on the Japan Sea, East China Sea, and the adjoining seas. The range of temperature increases in the interiors, as the winters become colder and summers warmer.