Which of the following Countries are on the African Continent: Nigeria, Ethiopia, Egypt, Tanzania, Kenya, United Kingdom, Belgium, France, Germany, Russia, Afghanistan, Iraq, Brazil, Columbia.
Of the Countries you listed, Nigeria, Ethiopia, Egypt, Tanzania, and Kenya are on the African continent. 
 
 For reference: 
 
 United Kingdom, Belgium, France, Germany, Russia are on the European continent
 
 Afghanistan and Iraq are on the Asian continent
 
 Brazil and Columbia are on the South American continent