Answer:
The Call of the Wild is a story of transformation in which the old Buck has to adjust to harsher realities of life where survival is only imperative.
Step-by-step explanation:
So all and all he has to get better with his surroundings and make the transformation with his survival skills in order to survive.
Side bar: The moral of it is to follow your instincts. And although Buck is loyal to his owner he follows his gut instead.