1. How can knowledge about mole be useful for environmentalists?
a. Mole concept can be used in environmental monitoring.
b. It gives information on the most dangerous pollutant in the
atmosphere.
c. It gives a feedback on the kinds of pollutants present in the
atmosphere.
d. Mole concept can be used in quantifying the amount of
pollutant articles released in the atmosphere.​

Mole concept can be used in quantifying the amount of

pollutant articles released in the atmosphere.

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.