Omar is 13 and has started noticing facial hair when he looks in the mirror.He has also noticed that his shoulders are broadening.His father,who is a psychologist,tells him that these changes are known as

Question

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Secondary sex characteristics are physical changes that appear during puberty and are not directly involved in reproduction. The growth of facial hair and broadening of shoulders are examples of secondary sex characteristics. Primary sex characteristics, on the other hand, are characteristics that directly relate to reproduction, such as the growth of testicles and the onset of menstruation. "Menarche" refers to the onset of menstruation in females, while "spermache" is not a recognized term.

Omar Is 13 and Has Started Noticing Facial Hair When