What physical factor contributes to the high population density in the Niger Delta?

The high population density in the Niger Delta can be attributed to the presence of flat, fertile farmland. This region is characterized by its rich alluvial soils, which are formed from sediment deposited by rivers. The fertility of the land allows for extensive agricultural activities, leading to increased food production, which in turn supports larger populations.

In addition to agricultural potential, the flat terrain in the Niger Delta also facilitates accessibility and transportation, further encouraging settlement and economic activities. This combination of fertile land and easy access makes the Niger Delta an attractive area for people seeking better living conditions and livelihood opportunities, contributing significantly to the area's high population density.

Other factors such as hilly terrain, desert areas, or high mountains would generally not support such dense populations due to challenges in agriculture and habitation, making them less conducive to sustaining large numbers of people.