The answer is SYSTEM (A)
For one, I received this answer because a Centriole is a cell that plays a role in the SKELETAL SYSTEM.
Secondly, a TISSUE is what makes up the bodily functions, the organs and what not.
Third, a PHYLUM is the term used for ranking in the animal kingdom.
Therefore, Ive came to the conclusion that “A-SYSTEM” is the only answer thats logical.
I hope this helps!!! loll