Answer:Physical: Growth spurts, development of secondary sexual characteristics (like voice changes, body hair, etc.), and hormonal changes.Emotional: Mood swings, developing a stronger sense of identity, and sometimes feeling more sensitive or self-conscious.Cognitive: Improved ability to think abstractly and reason, but also sometimes struggling with decision-making as the brain matures.Social: Changing friendships, greater desire for independence, and sometimes conflict with parents or authority figures.