Answer these questions. what are the stages of physical development? puberty when does puberty start for boys and girls? and what are the stages? what is the difference in primary and secondary characteristics? what are the stages of physical, emotional, and social development? what are the trimesters and what major developments happen in each state? what are some qualities of responsible adults?

I didn't answer all but I tried to answer as much as I could.

• Stages of physical development.
1. Infancy 2. Childhood 3. Adolescence 4. Adulthood 5. Elderly
(Idk if that was the stages you were asking for. There are many different physical development stages like in teens or babies, etc.)

• Puberty.
For boys, puberty can start at around an early age of 9-14. For girls, it's around the ages of 8-14.
Boy Stages:
-Growth Spurts
-Testicles & Scrotum
-Pubic Hair
-Penis
-Hands Feet & Ears
-Voice deepens
-Armpit & Facial Hair
Girl Stages:
-Growth Spurts
-Breast Growth
-Period
-Armpit & Pubic Hair

• Primary characteristics allow us to tell males & females apart, such as the male private part & women's private part. Secondary characters are the features that occur during puberty. Like the growth development in breasts or growing of pubic hair.

•Qualities of adults - Mature, skilled & experienced, makes solid decisions, self-confident, knows right from wrong, etc.

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