Final answer:
Alice is probably a late-maturing girl, as her shyness, lack of poise, and negativity towards menstruation are indicative of the emotional struggles typically associated with late puberty.
Step-by-step explanation:
Alice, an adolescent who tends to be shy and introverted, lacks poise, and feels unhappy about having menstrual periods, is probably a late-maturing girl. Puberty can impact adolescents in various ways. Late-maturing girls may develop poor body image and low self-esteem because they feel physically inferior to peers who develop earlier. Additionally, they might struggle with sentiments of not fitting in or feeling different due to the later onset of puberty. Conversely, early maturing girls often face a different set of challenges and risks, which can include higher rates of depression, substance abuse, and eating disorders due to their earlier physical development and the social pressures that come with it.