Identity and self-esteem are closely related and are very important to good mental health. Your sense of identity has to do with who you think you are and how you perceive yourself. It has to do with your sense of self-worth and how you define yourself. Self-esteem is how you value yourself.
I believe it's Vitamin A! hope I helped :)
Answer: Even though fats are the most energy dense of the three energy yielding nutrients ,carbohydrates which provide four calories /gram are your body's first choice for energy especially immediate energy.