Nigeria's economy is almost entirely dependent upon?

Nigeria's economy is heavily dependent upon oil export revenues. Oil exports account for a significant portion of the country's GDP (Gross Domestic Product), government revenue, and foreign exchange earnings. Nigeria is one of the largest oil producers in Africa, and oil and gas sector activities dominate the economy. However, it is important to note that Nigeria has been making efforts to diversify its economy, reduce its dependency on oil, and promote sectors such as agriculture, manufacturing, and services.