Nine-month-old Andrew looks intently as his older brother as he talks to him. In response he coos and babbles, as if having a conversation with his brother. Andrew is demonstrating an important social learning task that exemplifies

Learning from others

Explanation:

Learning from others which is a social learning task, could be directly or indirectly.

Direct learning occurs when you intentional inquire of others how to carry out a task or do something, listen or watch them  and then try to do what they did by imitating them.

Indirect learning is simply observing or watching how someone does something  and then imitate them.

in the case of nine month old Andrew, he was indirectly learning from his older brother.

because the early people found out about it.