Answer:
learning, kids that are lazy. kids who actually need help. and the teachers vary.
The answer is : Tar
Tar is some sort of residual substance that we commonly found in tobacco products, which could cause the symptoms you've mentioned above
not only that, Tar is a highly carcinogenic substance, which mean that it generate high risk of cancer it get into our system
Adrenaline regulates the fight or flights response.
I think it is c or build muscle strength
