The answer is A. a response of smiley faces made by the computer keys
Yes it alters the levels of neurotransmitters
Answer:
for examples: you are riding a bike before you ride a bike wear you gear first.
because gears can helps you from getting injury.
for another examples: you are on the road to don't get injury or anything you need to follow all the rules and beware of any situation that can happen in the road.
because if you did not follow the rules you may get injury or worst.
Might wanna reword the question