Read the excerpt from "Amigo Brothers.” As the two climbed into the ring, the crowd exploded with a roar. Antonio and Felix both bowed gracefully and then raised their arms in acknowledgment.

Antonio tried to be cool, but even as the roar was in its first birth, he turned slowly to meet Felix’s eyes looking directly into his. Felix nodded his head and Antonio responded. And both as one, just as quickly, turned away to face his own corner.

What type of conflict is described in this excerpt?

character versus animal
character versus character
character versus society
character versus nature