Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
Humans，like other animals，interact through （ ） behavior by means of signs or symbols used conventionally. (communicate)
【正确答案】：COMMUNICATIVE
【题目解析】：
根据前文的interact through 和后面的behavior可知空白处应填形容词来修饰behavior。句意：人类和其他动物一样，通过传统的标志或符号进行交流。