Concept:Nigeria’s relief is divided into lowlands and highlands. This question asks for the area that is not a lowland.Explanation:The Chad Basin, the Coastal Plain, and the Niger-Benue trough are all lowland regions in Nigeria.The Eastern Scarpland, however, is a highland area found in eastern Nigeria.It includes the Udi-Nsukka Plateau, which rises to about 300−600 m above sea level.Therefore, the Eastern Scarpland is not a lowland.Answer:B. The Eastern Scarpland