1. Admiran
2. Observan
3. Miran
You can try any of this. They kinda have the same meaning
The correct answer is aquella, because we would use the word if there was a difference in the distance. Like if you were in the right corner of a room, and the guitar was at the left corner of the room. And another reason is because aquella is feminine and in spanish, guitar is feminine.
A possible answer may be "nacio" which means born.