Social milestone is when a child interacts with others, which includes responding using body language. For example, when an adult waves at the child, then the child waves back at him/her or when you smile and the child smiles back. The answer is - the child shows understanding by responsive body language.
Yes, they can
For example is when we're handling child abuse case. Often time, a young children still haven't be able to communicate really well through written or verbal tools,
That's when simple images or object like dolls can be more effective communication tools
