The correct response to the phrase "The dominant primordial beast was strong in Buck" is "Buck followed his deepest instincts." This phrase is from the novel "The Call of the Wild" by Jack London and refers to Buck, a dog protagonist who is forced to adapt to the harsh realities of the wild. The phrase means that Buck's primal nature and instincts were very powerful and influential in guiding his actions and behavior. Given this context, it implies that Buck's actions were driven by his animalistic nature rather than rational thought or societal conditioning. In this sense, Buck was not simply eager to fight his rival or gained physical strength, but rather he embodied the untamed, instinctual essence of a wild beast.
The correct response is: Buck followed his deepest instincts.
