Umjikelo wonke wolwazi onamacala amathathu abonisa umhlaba, izitishi, izixhobo kunye neemodyuli.
Indawo yokwenyani ibuyiselwe ngokugqibeleleyo.Kuvakala ngathi ukwindawo naxa ungekho.
Ilungelelaniswe ngokugqibeleleyo kwiimeko ezininzi kunye nezixhobo ezininzi.
Fumana ngokuchanekileyo ii-odolo zomsebenzi ophosakeleyo, kunye nokusebenza kude kunye nokugcinwa kuyasebenza kwaye kulula.