Which of the following was one of alfred adler's main contributions to personality theory?
a. advocating for analytical psychology
b. the idea that men have womb envy
c. the theory that our personality develops in psychological stages
d. suggesting that our birth order shapes our personality

d. suggesting that our birth order shapes our personality

Explanation:

Alfred Adler, a friend of Freud,  who followed the school of individuals psychology and he believed in the importance of social connections when seeing the childhood development and the emergence of social development. He claimed that older siblings who used to get the focus of their parent's attention have to share the attention when a new child joins the family. The youngest child according to Adler, gathers more attention thus leaving the middle child with less opportunity and later on gets reduced as the opportunities available to the older children. According,  to his happiness of mankind lies in the fact of being together and concluded that the inferiority in childhood drives people to attempt to gain priority and is the force behind all of our thoughts, emotions, and behaviors.