The answer is C. species are the smallest taxonomic group. I also have taken this test before
answer: binary fission
explanation:
binary fission is when a single celled organism divides to asexually reproduce two new organisms
B. Cladistics, because the other two choices don't make any sense.
The answer that you are looking for is Chloroplast.
The reason why this is the answer is because the Chloroplast allows plants to make food with the help of sunlight.
I hope this helped :)