Tawm cov khoom siv lossis cov ceg av ceeb, qhib qhov rooj qhib rau sab nraud, thaum muaj mob xwm txheej ceev. Cov khoom tawm tawm yog qhov yuav tsum tau los ntawm kev tsim cov cai thiab chav tua hluav taws hauv zos rau ntau lub tsev. Cov tsev yuav tsis kis tau yog tias lawv tsis tau nce txog lub neej kev nyab xeeb hauv lub neej nrog kev nyab xeeb ntawm qhov rooj.
