Final answer:
Kohlberg's theory of moral development includes three levels: preconventional, conventional, and postconventional.
Step-by-step explanation:
Lawrence Kohlberg developed a theory of moral development that includes three levels: preconventional, conventional, and postconventional. In the preconventional stage, young children experience the world around them through their senses. In the conventional stage, teenagers become more aware of others' feelings and take them into consideration when determining what's 'good' and 'bad.' The postconventional stage is when people begin to think of morality in abstract terms, such as believing in universal human rights.