Kusetshenziselwa ukuvivinya, ukuhlola kanye nokuqalisa ukusebenza kwendwangu enamandla ngendwangu emanzini awuketshezi. Kususelwa ekukhombeni kwamanzi ukumelana, ukuphendulwa kwamanzi kanye nohlobo lokumunyisa amanzi kwesakhiwo sendwangu, kufaka phakathi i-geometry kanye nesakhiwo sangaphakathi sendwangu kanye nezimpawu ezihehayo zendwangu.
