Concept:Gold mining in Nigeria is commonly associated with the Ilesha area of Osun State.Explanation:Ilesha lies on the basement complex rocks where gold-bearing veins are found.Small-scale miners use simple tools like diggers, hoes, and shovels to extract gold ore.The gold is often consumed locally because the quantity mined is small.Other options do not match: Burutu is a river port, Jos is known for tin, and Ughelli is an oil-producing area.Answer:C. Ilesha
