Nearly every year, many people in the country of bangladesh, located at the mouth of the ganges river, die in raging floods. a major cause of these floods is overpopulation in bangladesh deforestation in india increased rainfall the greenhouse effect

The correct option is INCREASED RAINFALL.
Flooding occurs when a high volume of water is carried by a river into an area where the water can not be drained away adequately. The flooding of the Grange river is a seasonal occurrence which normally occur during the rainy season. Due to the interaction of many factors, the river usually overflow during the rainy season.