Final answer:
Summer seems to be different from the other girls in fifth grade due to her academic achievements and praised personal qualities, implying she could be the best student, which aligns with the information given about her good ability, studious habits, and very fine character.
Step-by-step explanation:
Based on the description provided, it seems that the correct answer to the question 'How is Summer different from the other girls in fifth grade?' is not explicitly given in the choices of class clown, shy and quiet, best student, or most fashionable. Instead, the description highlights her being one of our best students, having 'good ability, studious habits, and a very fine character'. Assuming Summer is the person referred to, this would suggest that she could be best described as the best student among her peers in the fifth grade, given her academic achievements and the praise regarding her personal qualities. However, without additional context about the other girls in her grade, this analysis is based solely on the attributes of Summer as relayed by the reference provided.