Final answer:
Option (a), Language intervention approaches in mother-child interactions are based on naturalistic interactions, which is true.
Step-by-step explanation:
Many approaches in language intervention are based on naturalistic mother-child interactions. This is true. In American culture, the concept of motherese, which involves caregivers interacting with babies in a specific way, is commonly used to promote language learning.
However, other cultures have different approaches, such as sitting the baby on the lap facing outward and engaging in conversations with siblings. Language socialization researchers emphasize the importance of social contexts in which language is acquired.