Answer:
oxygen and lungs
Explanation:
because when you breathe you inhale oxygen and the lungs put it in the blood
end up loosing more weight
i dont know if its correct because theres no answer options but yeah, hope it helped
i think its D....cuz they all make sense to me
An imbalance in the naturally occurring neurotransmitters in the brain - A.
I hate English and science lol
