Answer:
The answer is D
If it is a multi select, I would do A and D
Explanation:
Antibodies, antigens are the bad things antibodies fight :)
Answer:
move air towards the lungs and warm, moisten, filter
Explanation:
the upper respiratory system incldues your mouth, nose, trachea, and a portion of your lungs
Vitamins all pregnant women need to be nourished
Answer:
seek help
alert someone
i'm not sure though that's just my guess