Personal identity is the concept you develop about yourself that evolves over the course of your life.
This may include aspects of your life that you have no control over, such as where you grew up or the colour of your skin, as well as choices you make in life, such as how you spend your time and what you believe. You demonstrate portions of your personal identity outwardly through what you wear and how you interact with other people. You may also keep some elements your of personal identity to yourself, even when these parts of yourself are very important.
