Concept:First language acquisition happens naturally without formal instruction, as children learn by observing and imitating their surroundings.
Explanation:Children acquire their first language through a subconscious process called language acquisition.
They listen to and repeat what they hear in their everyday environment.
This process does not need any direct teaching or tutoring.
It occurs automatically in the natural setting of the child's home and community.
Therefore, the first language is learned in a natural setting, not a formal or tutored one.
Answer:Option D (natural setting)