Concept:Language acquisition is most effective through natural communication and real-life interaction, not through memorizing rules or analyzing structure.
Explanation:Children naturally learn their mother tongue by listening, speaking, and interacting in their home and society.
This same principle applies to second language learning.
When learners use the language in real conversations, discussions, or debates, they develop communicative competence.
A natural interactive environment allows them to practice meaningfully, unlike studying grammar or literature alone.
Thus, practical usage in context is key to acquisition.
Answer:A. using the language in a natural interactive environment