The answer would be ecosystem.
- I hope this helps! (:
I would say the second answers, growth. This is because we need the nutrients and vitamins from food to help us grow, and keep us healthy.
Anaphase I begins when the two chromosomes of each bivalent (tetrad) separate and start moving toward opposite poles of the cell as a result of the action of the spindle. Notice that in anaphase I the sister chromatids remain attached at their centromeres and move together toward the poles.