Question

read the passage
all that stirring of old instincts which at stated periods drives men out from the sounding cities to forest and plain to kill things by chemically propelled leaden pellets, the blood - lust, the joy to kill - it was bucks, only it was infinitely more intimate. he was ranging at the head of the pack, running the wild thing down, the living meat, to kill with his own teeth and wash his muzzle to the eyes in warm blood.
what feeling does the passage describe in buck?
anger at chasing the rabbit and leading the pack
fear in chasing the rabbit and leading the pack
sadness at chasing the rabbit and leading the pack
instinctual joy in chasing the rabbit and leading the pack

Explanation:

The passage describes an old - instinct stirring in Buck, leading him to chase and kill. Words like "ranging at the head of the pack" and "to kill with his own teeth" suggest an instinctive joy rather than anger, fear, or sadness.

Answer:

Instinctual joy in chasing the rabbit and leading the pack