Ngokuphunyezwa ngokuthe ngcembe kokuhlelwa kwenkunkuma, ukukhetha iingxowa zenkunkuma kuye kwaba yinto enzima ebomini babantu.Iingxowa zenkunkuma zifumaneka ngemibala eyahlukeneyo njengeengxowa zenkunkuma ezinokubola kunye neengxowa zenkunkuma eziqhelekileyo, eziluhlaza okwesibhakabhaka, ezibomvu, ezimnyama, njl.
Funda ngokugqithisileyo