Concept:The Southern coast-lands of Nigeria form the Niger Delta region, where oil exploration is extensive.Explanation:The development of Nigeria's Southern coast-lands is severely hindered by oil pollution and spillage.Oil spills damage farmlands, fishing waters, and mangrove ecosystems, affecting the livelihoods of the local people.Poor soil fertility, ocean tides, and hilly terrain are less significant compared to the environmental damage caused by oil activities in this region.Answer:B. Oil pollution and spillage