Final answer:
Jack in 'Lord of the Flies' is the character who clearly shows sadistic impulses, taking pleasure in power and the act of hunting, which symbolizes human potential for savagery.
Step-by-step explanation:
In William Golding's "Lord of the Flies," Jack Merridew is the character who exhibits sadistic tendencies throughout the novel. This is shown in his cruel leadership style and pleasure in gaining power over others, especially when it comes to hunting and eventually, the hunting of other boys.
He enjoys the act of hunting and savagery, and as the story progresses, his sadistic impulses grow stronger, leading to the degradation of society among the boys on the island. Jack's actions and behaviors depict the theme of innate human cruelty and the potential for savagery within humanity when unrestrained by societal norms and laws.