Final answer:
Monsoon circulations occur most noticeably in coastal areas, such as parts of Bangladesh and eastern India.
Step-by-step explanation:
The correct answer is B) Coastal areas.
Monsoon circulations occur most noticeably in coastal areas. Coastal regions in South Asia, such as parts of Bangladesh and eastern India, receive heavy rainfall during the monsoon season. These areas experience severe flooding, while regions further inland, including mountainous regions and polar regions, do not experience the same level of monsoon circulation.
For example, the worst-hit places are along the coast of the Bay of Bengal, such as in Bangladesh, where heavy rain and flooding occur during the monsoon season. In contrast, western India and Pakistan have less danger of flooding as the rain clouds lose their moisture by the time they reach these regions.