Answer:
Inferiority
Step-by-step explanation:
Inferiority is the fourth stage of psycho social development theory. This is the fourth stage that occurs between the age of 5 to 12. At this stage a child learns to do the sums, to read, write and learn something new.
Teacher plays an important role in the development of children. They develop specific skills in children. This stage develops a greater sense of self-esteem in children which is significant.
When the child is encouraged or motivated, children start to feel competent and industrious.
Thus crystal was on the stage of Inferiority.