Answer:
If you suspect someone is having suicidal thoughts, do not confront them. ask an adult that is their guardian if they are having any trouble. if they say no, THEN ask that someone. if they say no, keep peserting gently, and carringly, so you get the answer out of them. if they are, then try to help them get through it, if not, no need to worry about it(however, check there body for cuts, check their room for any sharp objects)
I think the answer is a. low metabolic rate
hope it helps.
C nasal cavity, pharynx, trachea, bronchi, bronchioles
Have seven on each group. theres nothing wrong with that