Simple Explanation
River delta fertile land और water के कारण traditionally dense settlement support कर सकता है। लेकिन rising flood risk housing, livelihoods और infrastructure को threaten कर सकता है। कुछ residents safer inland areas की ओर shift कर सकते हैं। इसलिए चौथा विकल्प सही है। परीक्षा में population distribution को changing environmental hazards के प्रति dynamic response के रूप में भी समझना चाहिए। / A river delta can traditionally support dense settlement because of fertile land and water. However, rising flood risk can threaten housing, livelihoods, and infrastructure. Some residents may move toward safer inland areas. Therefore, the fourth option is correct. In examinations, population distribution should also be understood as a dynamic response to changing environmental hazards.
