This actually depends on which level of education you are and what they are looking for. Most people though merely considers it a part of the Digestive System as the bile it stores is used during digestion.
I have seen however several people put it down as part of the bilary system or subsystem which responsible for the creation and distribution of bile.
Answer:
I'd say 4 and 5. I'm guessing.
Explanation:
I believe the answer would be d.muscle cramps. Breathing in toxins seems like it could relate to the other three answers.
Sandpaper for toil or paper!! It would burn tho...
