Context: There is some solace in thinking this way , I suppose , because we can believe that there are no faceless enemies out there . Only the enemy next door , the one we know . That is more comforting , I suppose . The attacks changed the world . From the way we travel to the way we see the world . But as I sit and type this , a blue jay calls out , the wind shakes leaves from trees , and a lawnmower is heard in the distance . When there are no words to say , it is best just to listen .

Question: What may have caused you to think that there are faceless enemies ?
Options:
0. None of the above choices .
1. There are terrorists that will use violence .
2. Someone attacked me and it changed the way I view the world .
3. I did some travel and met terrorists .
Answer: 1