The mother's concern for Anthony is best shown by the detail that he had to start a new school mid-year and was learning his way around a new city, showing the challenge of adjusting to a new environment.
The detail from the passage that best shows why Anthony's mother is concerned about him is “He had to start a new school in the middle of the year and he was learning his way around the city just as I was.” (paragraph 7). This detail indicates that the mother is worried because Anthony is facing the challenges of adjusting to a new environment, which can be stressful and disorienting. It implies a concern for his social and emotional well-being as he navigates these changes.
"He had to start a new school in the middle of the year and he was learning his way around the city just as I was." (paragraph 7)
This detail indicates that Anthony is facing the challenges of adapting to a new school and environment, and it suggests a potential source of stress or difficulty for him, prompting his mother's concern.