Read the following context and choose the best option to answer the question.
Context: Not all made it , but Apollo , my boxer and best friend , made it into another story . It may seem ridiculous for me to feel so attached to these friends of mine . But for a long time , they were all I had . Each one had their own personality , and we were like a pack . I will never forget them , and I miss them still .
Question: What is Apollo 's relation to the narrator ?
Options: 
- Apollo is their pal .
 - Apollo is their dog .
 - Apollo is their friend .
 - Apollo is their classmate .


Apollo is their dog .