<prompt> Yini into eyinhloko engabangela ukubola kwezinto eziphilayo emanzini? Njengoba kunikezwe umbuzo odlule, bhala umongo onempendulo yawo. Kungaba imisho engu-1 kuya kwengu-20. Umongo:  <response>: I - oxygen ekhululekile nayo iyatholakala njengesixazululo emanzini omhlaba. Ukwanda kokuncibilika kwe-O2 emazingeni okushisa aphansi bheka izakhiwo ze-Physical kunomthelela obalulekile empilweni yasolwandle, njengoba izilwandle ezibandayo zisekela ukuqina okukhulu kakhulu kwempilo ngenxa yokuqukethwe kwayo okuphezulu komoya-mpilo. Amanzi angcoliswe izakhi zezitshalo ezinjenge-nitrate noma i-phosphate angakhuthaza ukukhula kwe-algae ngenqubo ebizwa ngokuthi i-eutrophication futhi ukubola kwalezi zinto eziphilayo nezinye izinto eziphilayo kunganciphisa inani le-O2 emithonjeni yamanzi e-eutrophic. Ososayensi bahlola lesi sici sekhwalithi yamanzi ngokukala izinga le-oxygen edingekayo emanzini, noma inani le-O2 elidingekayo ukuze libuyiselwe ezingeni elijwayelekile. 