Prolonged and constant use of tobacco can weaken the user's immune system and increase the risk of many diseases.

which disease makes the air sacs in the lungs less elastic, reducing their ability to absorb oxygen?

chronic bronchitis would be the correct answer for plato users

it can be both; depending on the situation at hand.

explanation:

let's just say i get in to a confrontation with someone, and they say "ur mom", it could be seen as an insult. or depending on the relationship or comfortability with the person it may be seen as a joke. the distinct line is how the chemistry behind the confrontation.