Based on research into the development of self-recognition, Michael will most likely touch his nose because he wants to wipe off the spot on his nose.
This is a study to the way that children respond to a reflection of themselves which they see. When a child is placed in front of a mirror, he is likely to respond in certain ways.
When Michael sees the spot on his nose, he notices that there is a mark there so he tries to touch it.
Read more on self recognition here: https://brainly.com/question/2071859