:Facial hair, moustache and BEARD begin to growFacial hair, moustache and beard begin to growHair starts growing on the chestFacial hair, moustache and beard begin to growHair starts growing on the chestHair grows in the armpit and genetial regionFacial hair, moustache and beard begin to growHair starts growing on the chestHair grows in the armpit and genetial regionReproductive phase of life beginsFacial hair, moustache and beard begin to growHair starts growing on the chestHair grows in the armpit and genetial regionReproductive phase of life beginsChange in the voice, growing tall, pimples on the face are some changesIn girls:Breasts begin to developHair grows in the armpits and genetial regionReproductive phase of life beginsThe first menstrual cycle begins TERMED as "Menarche"Explanation:Secondary sexual characters:Secondary sexual characters:Characters that are developed in adolesence age are called secondary sexual charactersSecondary sexual characters:Characters that are developed in adolesence age are called secondary sexual charactersThese MAY DIFFER from boys to girls