Energy needs, in total kilocalories per day, are greater during than any other time of life.
a. adulthood
b. adolescence
c. childhood
d. infancy

Energy needs, in total kilocalories per day, are greater during adolescence than any other time of life. The correct option among all the options that are given in the question is the second option or option "b". Only during the time of pregnancy will a girl require more kilocalories per day than during the time of adolescence.