The East Asian region labeled with the number 4 on the map above is the climate region. A. humid continental B. subarctic C. semiarid D. arid

Option A (humid continental) seems to be the correct answer.

Explanation:

Humid continental environment, the Koppen proper definition's main climate category, which experiences broad seasonal weather distinctions including summers as well as mild winters. Throughout the main zone of the dispute between polar as well as tropical jet streams, these are located between 30° but instead 60° N throughout eastern and southern Latin America.

Some other alternatives offered are not connected to the scenario in question. So, the solution here is just the right one.