chapter 19 how does the authore creates fear in this chapter

One night three weeks after the championship, Billy's dogs chase what he thinks is a bobcat. They have killed them before, but Billy thinks it is an unnecessary risk. They tree the cat, and Old Dan is especially vicious. Billy realizes they have not treed a bobcat, but a dangerous mountain lion.

The lion jumps out of the tree and fights the dogs. Little Ann is wounded, and Billy joins in the fight with his ax. The lion turns on Billy, but his dogs protect him. The fight continues down the mountain. The lion has Old Dan's throat, but Billy lodges the ax in its back. The dogs finish it off as it tries to get to Billy. Billy faints and wakes up. The lion is dead and the dogs are still holding on to it with their jaws.