When London speaks of Buck metamorphosing, he means Buck
changed into a different kind of dog.
Metamorphosis is a biological process by which an
animal physically develops after birth or hatching, involving a conspicuous and
relatively abrupt change in the animal's body structure through cell growth and
differentiation.
The correct answer between all
the choices given is the first choice or letter A. I am hoping that this answer
has satisfied your query and it will be able to help you in your endeavor, and
if you would like, feel free to ask another question.
