Pob tshab iav lub tais yog ib qho khoom siv zoo heev hauv tsev neeg, nws tuaj yeem siv los khaws cov zaub nyoos, cov khoom noj khoom haus, cov khoom noj ntxiv, txiv hmab txiv ntoo, txiv ntseej thiab lwm yam khoom noj, yog thawj qhov kev xaiv ntawm ntau tsev neeg, nrog rau kev siv tib lub sijhawm, lub khob iav kuj zoo nkauj heev, yog tsev neeg kho kom zoo nkauj.