Answer:
Flying on an airplane, riding a car, train, or boat.
Explanation:
The different motions that cars or airplanes make can make us feel uneasy or unwell. Our bodies aren't used it to it, and some people are more sensitive to the motions.
Being Exposed to Radiation. Also, being exposed to harmful Toxins.
Answer:
alveoli
Explanation:
because carbon dioxide moves from the blood in the capillaries to the air in the alveoli