The answers is 50% that would be round
Answer:
I am pretty sure the answer is B.
Explanation:
I believe that the best answer to this question is d. amino acids.
My answer would vectors. Maybe there's another word but this one means an organism which transmits disease and parasites from one organism to another.
Maria and Carlos should look for stems, and roots, leaves and bark. If there are stems or roots,etc. then it would be a plant. Fungus doesn't have stems, roots, leaves and bark.