body fluids, always wear PPE.
A: because fragmentation in multicellular organisms is a form of asexual reproduction in which an organism is split into fragments
The answer can be both increase in self-esteem and increase in aggression. All of the research generally points to increase of self esteem because during puberty self awareness is very prominant which increases self esteem. I would be safe and go with self esteem. I hope this helps.
Endoskeleton I think it's a little hard to read this question