What is one example of emotional development?

The first emotions that can be recognized in babies include joy, anger, sadness and fear. Later, as children begin to develop a sense of self, more complex emotions like shyness, surprise, elation, embarrassment, shame, guilt, pride and empathy emerge.

Im not guaranting that im right, but ... emotional development should be when a person changes or develops feelings. An example would be a person that went from being depressed to happy