Concept:A conurbation is formed when separate urban settlements expand and merge into one continuous built-up area.Explanation:When two or more towns or cities grow so much that their outskirts join together, they form a single large urban zone.This merging may happen because of population growth, industrial expansion, or improved transport links between the settlements.Examples include Lagos–Ikeja in Nigeria and New York–Philadelphia in the United States.Among the options given, the term that correctly describes this process is “conurbation.”Answer:C. Conurbation