The word that is being looked for in this problem, which is among the words presented as options together with the problem, is most probably and most likely to be the word green.
Sending electronic documents is a way to contribute to green computing. Green computing is all about efficiency and an approach in not contributing to the pollution already present in the world. Through sending electronic documents, we reduce the number of papers used which in turn lowers the number of trees to be cut down, even if just by a few numbers.
