I THINK its D I am NOT positive but I hope it helps, again I am not sure.
I think the answer is color.
Answer:
In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. ... Evolution relies on there being genetic variation in a population which affects the physical characteristics (phenotype) of an organism.
Explanation:
Hope this helps!
Answer:
it looks like point A but i may be wrong
Explanation:
it has the least amount of oxygen compared to the other points
i also have not looked at bio in 2 years
hope this is right and helps if not i am v sorry <3