<span>D) Vaccines allow for building immunity without harmful exposure because not all viruses are safe to be exposed to.</span>
So that the cell itself can maintain homeostasis and balance out its necessities
The answer is A. Competition
is the contest for limited resources by
two populations of between individuals of
a population. Some populations adopt resource partitioning to reduce the stiff competition and mitigate the
disadvantages interaction leading to
coexistence of competing populations.