Mountain lions with lots of variation because variation is important for species’ survival. If there is an environmental change that negatively affects organisms with a certain trait, variation can insure that the entire species will not be wiped out because some organisms within that species might not have that trait and can survive.
Physical is something you can have/ hold and mental is something in ur head that you can't see or hold.
If we all had the same DNA that would mean we would all be the same, no differences <span />