The answer is "B" because it's used to help a strain ankle and other things.
Answer: The three answers that are in the fire triangle are oxygen, heat, and fuel.
Explanation: Whichever one is not one of those answers is not in the fire triangle.
Not 100% sure but either B or D
Definitely not A though, an ER is only for emergencies
The system that does all of this is the limbic system I hope you pass