Two-year-old melissa calls the postman "daddy" when she sees a man with large shoes and long pants at their doorstep. her mother says, "no, that's the postman! " melissa is displaying and her mother is teaching by

Melissa would be displaying the thought of thinking someone was someone else. She recognized the large shoes and long pants so displaying recognition would work.

Her mama would be teaching by telling. After the Mother says this, Melissa will most likely catch on because the mom said no, that’s wrong.