When buck joins a wolf pack after thorton's death is a part of which plot element in the call the wild
a. conflict
b. exposition
c. resolution
d. rising action.

C. Resolution

Explanation:

This event is part of the resolution of the story. The resolution takes place towards the end of a story, and this is the moment in which all conflicts come to an end. In this case, the death of Thorton precipitates the end of Buck's existence as a domestic animal and signals his abolute entry into the wild, thus allowing the story to come to a satisfactory conclusion.

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.