Final answer:
The stage of single-word speech production is known as the Holophrastic stage. During this stage, children have a limited vocabulary but can convey meaning through one-word utterances.
Step-by-step explanation:
The stage of single-word speech production is known as the Holophrastic stage. During this stage, children only produce one-word utterances, but these words often carry larger meaning. For example, a child saying "cookie" could be identifying a cookie or asking for one.