Read the excerpt from “Husky–The Wold Dog of the North.” It is in fighting that they betray their most wolfish trait. As long as two combatants are on their feet there is no interference, the onlooking huskies merely crowd interestingly around, ready, however, for the first slip. And the instant one or the other of the dogs goes down, the whole band pitches upon him. . . . The loss of more dogs is due to this than to any or all other causes combined.

Which best states how this excerpt adds to a central idea in the passage?

The excerpt adds more information about how dog sled owners lose their prized huskies.
The excerpt adds more information about the similarities between huskies and wolves.
The excerpt adds more information about how huskies fight among themselves.
The excerpt adds more information about how huskies interact with humans.