For Girls it is usually Menstruation, periods begining.
For boys it is generally the voice deepening.
Your period.
Your period.
Sounds like you are a young teenager. Don't worry about this as you are in puberty and everything is on the change at present. It will grow during puberty which can last up to 18-years-old.
You probably have started puberty, you just haven't started your period. This is completely normal. Breast tenderness is a common symptom during puberty and can last for quite sometime. It is different for everyone.
The effects of puberty can last into the early 30's.
Yes Zendaya hit puberty last month
Adolescence is another way of saying Puberty. It generally is whilst a child is going through puberty that they are called adolescents so it would last the same time.
Puberty starts at 11 and ends at 15/16. So puberty lasts nearly 5 years.
it really depends on you body and when it is ready to begin the process but for a boy it normally starts from 10-15 and females strat a bit earlier and what i mean by 10-15 is not how long it last puberty last to about 20 years old
A uretha is part of a vagina. Last time I checked, boys didnt have vaginas. Well, maybe you do.
the human dies
I'm not really sure what you're asking. Menarche, or a girl's first period/first menstrual cycle, can only occur during puberty, is a part of puberty, and by definition is generally considered to be one of or the LAST change the occurs in puberty for girls. Other changes such as growth spurts, changes in breast tissue that progresses to the development of breasts, hair growth in new places (e.g. underarms, pubic hair), and all the changes that are occurring in less obvious ways (changes in the brain, hormone levels, etc) all usually happen prior to or at least start before menarche (in normal, healthy girls). If you are really asking perhaps "why it is considered the culmination of puberty in girls", then the above is your answer (it happens last, or close to last). But if you did indeed mean the question exactly as written, I suppose the real answer is "It's not an indication of puberty for girls." It would simply be a definition, I suppose - menarche merely means a girl, who is currently going through puberty, has experienced another change that happens during that time. So many other changes will happen first, like I explained above, so menarche is not used as an "indication" as far as I know. It's kind of like asking "why is gaining 10 pounds an indication of increasing weight?" Menarche is simply a part of puberty, just like gaining 10 pounds is a part of increasing weight.