malaria carrying mosquitoes . Its Human Development Index is one of the lowest on earth . 9.Angola Angola , officially the Republic of Angola ( Portuguese : República de Angola , pronounced  [ʁɛˈpublikɐ dɨ ɐ̃ˈɡɔlɐ] ; Kongo : Repubilika ya Ngola ), is a country in south-central Africa bordered by Namibia