Bacteria coat our skin, gut, and mouth. Also present are protists, archaeans, and viruses. Collectively, these organisms are our microbiota. For most members of our microbiota, our body provides their environment, or space, to live. They, in turn, have no effect on us. This is an example of:
A. an antagonistic relationship.
B. mutualism.
C. predation.
D. commensalism.

Explanation:

Commensalism :

1. Is the relationship between two different species in which one species get food or other type of benefits from other species, and in return other,the species is neither benefit nor harmed, it remain unaffected.

2. A commensal species benefits from another species by various ways like obtaining locomotion, shelter, food, or support from the host species, which neither benefits nor is harmed.

3. Example: The remora rides attached to sharks and many other types of fish.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.