Not a clue bro. on here for the same reason as you idiot
That would be the third (or second, if you don’t count prophase) step of mitosis, anaphase.
There are 7 unifying themes in biology
1.Cell structure and function
2.Reproduction
3.Metabolism
4.Homeostasis
5.Heredity
6.Evolution
7.Interdependence
The answer is B An observation about the number or amount of something