Cov tsom iav qhov muag zoo nkauj yog cov kev xaiv tsom iav uas muaj ntau yam xim thiab qauv tsim, ua rau lub qhov muag zoo li tob dua, ci ntsa iab dua, thiab ntxim nyiam dua. Hom tsom iav qhov muag tshiab no tsis yog tsuas yog zoo nkauj xwb, tab sis kuj muaj ntau yam ntxwv ua haujlwm thiab tiv thaiv.

Ua ntej, cov tsom iav qhov muag zoo nkauj muaj cov qauv tsim tshwj xeeb uas tuaj yeem hloov qhov loj ntawm cov menyuam qhov muag, ua rau lub qhov muag zoo li tob dua thiab ci ntsa iab dua. Lawv kuj tseem tuaj yeem ua kom cov xim ntawm lub qhov muag zoo nkauj dua, ua rau lawv ci dua thiab ntxim nyiam dua. Cov tsom iav qhov muag zoo nkauj tuaj yeem hloov qhov tsos thiab cov duab ntawm lub qhov muag, ua rau lawv zoo nkauj dua.

Cov tsom iav zoo nkauj kuj tseem tsom mus rau kev tiv thaiv qhov muag. Lawv muab cov pa oxygen zoo heev, ua rau qhov muag cua zoo thiab noj qab nyob zoo. Tsis tas li ntawd, lawv muab kev tiv thaiv UV zoo, tiv thaiv qhov muag ntawm cov teeb meem. Cov yam ntxwv no ua rau cov tsom iav zoo nkauj yog qhov kev xaiv noj qab haus huv thiab tiv thaiv.

Sib nrug ntawm cov yam ntxwv ua haujlwm thiab kev tiv thaiv no, cov iav sib txuas lus zoo nkauj kuj muab kev nplij siab zoo dua thiab kev paub siv. Lawv yooj yim heev rau siv thiab hnav, ua rau lawv yog qhov kev xaiv nyiam rau ntau tus neeg. Ntxiv mus, lawv kuj yooj yim heev rau kev ntxuav thiab saib xyuas, uas tso cai rau tib neeg kom yooj yim khaws lawv cov iav sib txuas lus kom huv si thiab huv si.

Zuag qhia tag nrho, cov tsom iav qhov muag zoo nkauj yog cov kev xaiv zam uas nrov heev uas muab kev zoo nkauj zoo nkauj nrog ntau yam kev ua haujlwm thiab kev tiv thaiv. Lawv tsis tsuas yog ua rau ob lub qhov muag zoo nkauj dua thiab ntxim nyiam dua, tab sis kuj tiv thaiv thiab tswj kev noj qab haus huv ntawm qhov muag.