Answer:
By the middle school years, girls' self-esteem is significantly higher than that of boys.
Explanation:
The self-esteem in girls by middle school years becomes generally lower than that of boys. This is because girls have to bear more criticism as compared to boys due to which their self esteem is lowered. Also, factors like hormones also play a role in self- esteem. Male are generally considered to be dominant for a society due to which their self - esteem is more as compared to that of women.