During what period are kcalorie needs per unit of body weight the highest

During adolescence are kcalorie needs per unit of body weight the highest.
The amount of energy (calories) needed during adolescence is high – between the ages of 15–18 years.
Adolescence is characterized by rapid physical growth and changes in body composition and this is the reason why nutritional and energy needs in this period are increased.

This is a time line from 685 to 978

Species, populations, community, ecosystem, biome, biosphere.