When a young child begins to learn how to take turns in conversation, stay on topic, and give appropriate responses such as "please" and "thank you," the child is demonstrating knowledge of .

pragmatics

Explanation:

Pragmatic Knowledge : This describes the knowledge of different ways in which language is used in different environment and for different purposes. When pragmatic Knowledge Infants' is to be described, it firstly starts with expression of communicative intent first which goes beyond the use of words such as facial expression, gaze, and gestures.

a gummy bear

Explanation: