whAt is thE mAin iDEA oF lAst two pArAgrAphs
A．thE DiFFErEnCE AnD rEsEmBlAnCE oF using lAnguAgE BEtwEEn humAn BEings AnD AnimAls.
B．thE FunCtion oF lAnguAgE.
C．how thE humAn BEings proDuCE thE sounD.
D．humAns ArE ChArACtErizED in mAny wAys to usE symBoliC CommuniCAtion.