Final answer:
The correct answer is d. labeling. All of the other strategies mentioned - recasting, expanding, and redirecting - are commonly used by parents to teach their children language.
Step-by-step explanation:
The correct answer is d. labeling. All of the other strategies mentioned - recasting, expanding, and redirecting - are commonly used by parents to teach their children language. Recasting involves rephrasing a child's incorrect statement in a grammatically correct manner. Expanding involves adding more information to a child's speech. Redirecting involves guiding a child's attention to another topic. However, labeling refers to the act of assigning a word to a specific object or concept, which is a fundamental strategy in language learning.