Z{- Ibarabara

A: Z- ivyuma bikoreshwa cane cane mu bibanza binini binini vy’ugufasha n’uruhome, bishobora kuzigama neza icuma.

I: Bivana n’ivyo umuntu akeneye vyihariye. Igihe umugambi usaba - Igishushanyo c'ubufasha, Z{2}} ivyuma bifise ivyiza vyinshi; igihe umugambi ufise ibisabwa vyinshi ku bijanye n’ugushiraho, gukoresha uburyo bwinshi n’ugushikama kw’inyuma kw’igitereko, C- ivyuma birabereye cane.

A: Z- ivyuma bikoreshwa cane cane mu bibanza binini binini vy’ugufasha no gufasha mu bibanza vy’ugufasha mu bikoresho vya PV, nk’imigambi ya PV iri ku gisenge c’amahinguriro manini manini y’inganda n’ubudandaji, imigambi ya PV ku ruhome rw’ibikoresho binini, n’ibindi.