Nọgidenụ na-ewu ewu ma nwee ntụsara ahụ na elu egwuregwu gradient a na obere mkpirisi setịpụrụ. Ezubere maka ma ụdị na arụmọrụ, setịpụ a nwere atụmatụ gradient mara mma, akwa na-eku ume, yana dabara adaba maka ọrụ ọ bụla. Egwuregwu egwuregwu dị elu na-enye nkwado na mgbanwe, ebe mkpirisi mkpirisi dabara adaba na-enye mfe ijegharị na ọdịdị nke oge a. Kwesịrị ekwesị maka mgbatị ahụ, ịgba ọsọ, ma ọ bụ uwe nkịtị, setịpụ a bụ mgbakwunye mara mma na mkpokọta uwe na-arụ ọrụ gị.