300
Put the types of communication (nonreduplicated babbling, cooing, marginal babbling, protowords, true babbling, crying echolalia, first words, reduplicated babbling) in the order that they are used (birth to 12 months of age)
What is crying, cooing, marginal babbling, true babbling, reduplicated babbling,echolalia, nonreduplicated babbling, protowords, first words.