I would say that she didn't correct her wrong answers after the first test, therefore making her confused on the second.
Answer:
I think it's a blood vessel
Passive smoking is when a person inhales cigarette smoke without actually smoking. Someone in the same room or car may be smoking, and others can inhale the second hand smoke.
The effects can be similar to that of smoking, if the person lives iwth a smoker or spends a lot of time around people smoking. Generally, occasional exposure isn't harmful.
