Final answer:
The United Nations includes 15 countries in the region of West Africa. The Economic Community of West African States (ECOWAS) was created in 1975 with 15 member countries. The African Union was established in 2001 and includes countries from all regions of Africa, including West Africa.
Step-by-step explanation:
The United Nations includes 15 countries in the region of West Africa.
The Economic Community of West African States (ECOWAS) was created in 1975 with 15 member countries to promote trade, transportation, security, and industry. The organization has since expanded to include additional political and economic agreements with various African countries.
In 2001, the African Union was established to help African states compete in the international marketplace, and it includes countries from all regions of Africa, including West Africa.