Lub luag haujlwm tseem ceeb yog los tswj cov khoom sib txuas, cais cov khoom siv sib txuas ua ke, thiab tshem tawm cov khoom tawg. Cov txheej txheem tua hluav taws suav nrog cov hluav taws tua hluav taws sab nraum zoov, cov tshuab tua hluav taws hauv tsev, cov tshuab tua hluav taws, thiab qee qhov kuj muaj cov tshuab siv dej tsis siv neeg, cov tshuab tua hluav taws, cov tshuab siv tua hluav taws, nrhiav kom pom hluav taws, cov dej tsis zoo, thiab lwm yam.
Cov dej tua hluav taws feem ntau yog siv los ntawm cov tsheb tua hluav taws kom nqa dej los ntawm cov kav dej hauv nroog xa hluav taws xob lossis hluav taws sab nraum zoov tso cov kav dej sib txuas rau kev tua hluav taws, thiab tseem tuaj yeem txuas ncaj qha mus rau cov kav dej thiab phom dej kom tua hluav taws. Yog li ntawd, lub kaw dej sab nraum zoov tseem yog ib qho tseem ceeb ntawm cov chaw tua hluav taws rau kev tua hluav taws.
Lub luag haujlwm tseem ceeb ntawm rab phom tua hluav taws yog tua hluav taws. Qhov uas siv hluav taws tua hluavtaws uas twb muaj lawm tsuas yog ua haujlwm ntawm duav xwb. Txawm li cas los xij, ntau yam nyuaj hauv qhov chaw tua hluav taws yuav tsum tau muab rhuav pov tseg ua ntej tua cov haujlwm. Tua hluav taws tua hluav taws yuav muaj kev siv tau zoo dua Qhov teeb meem tsis zoo ua rau muaj kev tsis yooj yim rau kev tua hluav taws ntawm cov neeg tua hluav taws.
Tus tuav ntawm rab phom hluav taws (lossis rab phom tua hluav taws) feem ntau yog pleev xim rau xim liab txhawm rau cim qhov sib txawv ntawm rab phom hluav taws (lossis hluav taws tuaj) thiab lwm yam duav (lossis duav).
