Answer:
Mainly rainfall, temperature and situation.
The answer is B. Digestive and cardiovascular
Human Immunodeficiency Virus causes HIV
Varicella Zoster Virus causes chicken pox
Natural selection is the idea that organisms that posses favorable traits that enable them to survive in their environment are the ones that live long enough to pass on these traits to their offspring.
<h3>What is natural selection?</h3>
The question is incomplete but I will try my best to explain the idea of natural selection.
The term natural selection refers to the idea put forward by Charles Darwin that organisms that posses favorable traits that enable them to survive in their environment are the ones that live long enough to pass on these traits to their offspring. This is also called the survival of the fittest.
Learn more about natural selection: brainly.com/question/2725702
<span>b.Eusthenpteron might be a common ancestor of bats and humans.
Hope this helps!
-Payshence xoxo</span>