Why is there a difference in physical appearance between me and my friends? (height and size, hair appearance, breast size and shape)?
The signs of growth and change associated with puberty differ from one person to another, especially with regard to the timing of puberty, acceleration of growth, changes in height, hair growth, etc. The emergence of these changes is affected by many factors, the most important of which are heredity, gender, race, climate, chronic diseases, and others.
