Final answer:
When young adults do not achieve ego identity, they can experience a weak sense of self and role confusion.
Step-by-step explanation:
When young adults do not achieve ego identity, they can experience a weak sense of self and role confusion. This means that they may struggle to understand who they are and what they want to do with their lives. They may feel unsure of their identity and confused about the future. It is important for young adults to engage in a conscious search for identity and develop a positive self-concept in order to avoid feelings of loneliness and emotional isolation.