Which of the following is one of the perlocutionary, illocutionary, and locutionary stages in prelinguistic development?

The locutionary stage is indeed one of the key stages in prelinguistic development. This stage involves the actual production of words and the use of specific sounds to convey meaning, marking the transition from nonverbal to verbal communication. During the locutionary phase, infants begin to utter words with intention and can express desires or needs through their speech.

In contrast, the perlocutionary stage refers to the early phase of communication where an infant's actions and vocalizations elicit reactions from caregivers, but there isn't a true intention behind the communication. The illocutionary stage comes next and is characterized by the use of gestures and vocalizations to express intentions before mastering actual word use. Other options like articulation, intonation, and syntax do not correspond to the stages of prelinguistic development but rather refer to aspects of language development and structure.