Answer: c) Endemic
Explanation:
Endemism is the ecological state of a species being unique to a defined geographic location, such as an island, nation, country or other defined zone, or habitat
B, because it's not an advantage for something to be expensive and time consuming
Something that can be found in both viruses and cells is bacteria.
Sand should be your answer because it contains 5,0 premeability variation
There are currently 24 orbiting earth