Infant-directed speech and parent-child conversation foster referential communication skills have little impact on language development because language emerges spontaneously create a zone of proximal development in which children's language expands contribute to a decline in infantile amnesia

The child-directed speech or Infant-directed speech and parent-child conversation make an area of proximal improvement in which language skills expand in a child. In addition, child-directed speech is a technique of communication made up of short sentences with high-pitched, extravagant expression, clear pronunciation, and distinct pauses among speech fragments and recurrence of new words in a variety of frameworks.

The correct answer is