listEning 5 "zoologyClAss"
{$mEDiAurl}


ACCorDing to thE proFEssor, how Do CorAl rEEFs grow
A、thEy BEComE vEry lArgE By EAting othEr spECiEs.
B、thEy ConnECt CorAlitE shElls to BuilD struCturEs.
C、thEy Fill with oCEAn wAtEr to ExpAnD thEir sizE.
D、thEy CollECt DEBris From oCEAn liFE in thEir hABitAt.