Concept:Adolescence is a period of emotional vulnerability often called the age of 'stress and storm'.
Explanation:The development stages include infancy, early childhood, late childhood, adolescence, and adulthood.
During adolescence (12-18 years), physical changes occur due to hormones.
Emotionally, adolescents are very sensitive and face inner turmoil.
They often experience anxiety and self-concern because they are adjusting to new body image and social roles.
Other options like feeling of satiation, fear of past sins, or self-actualization are not typical for this stage.
Thus, adolescents commonly feel anxious and worried about themselves.
Answer:B. anxiety and concern about themselves