I cannot see the imagine very well would you mind taking another?
Answer:
Virus.
Explanation:
Viruses can't reproduce without invading the cell of another living being.
Gene flow is the phenomenon of transfer of gene from one species/population to others. According to Natural Selection, more suitable (which fits best with the environment) gene/allele make the characteristic of that individual. So, it increases the ability to survive and reproduction
Hope this helps!
Answer:
I think its D all of the above