(Question)
If exposure to air pollution can harm the lungs, then which type of pollution is most harmful to lungs? Answer choices: - Lead - air - Cars - oil - acid - CFCs - SO2 - mold
(Answer)
air

(Question)
If antigens are molecules that the defense system recognizes as foreign to the body, then what are molecules that the defense system recognizes as foreign to the body? Answer choices: - Allergies - lungs - antigens - bacteria - parasites - atoms - red blood cells - acetic acid
(Answer)
antigens

(Question)
If kicking an object transfers energy to the object, then what does kicking an object do? Answer choices: - to move people - Relieve pain - Injures feelings - decrease stamina - Transfers energy - Creates children - Stops object from moving - Decrease bodily water
(Answer)
Transfers energy