Question

____

is the confrontation of the protagonist with some strong force
represented by an individual.
a) Conflict
b) Theme
c) Resolution
d) Climax

Answer 1

The answer is conflict, here is the definition:

The opposing force created, the conflict within the story generally comes in four basic types: Conflict with the self, Conflict with others, Conflict with the environment and Conflict with the supernatural. Conflict with the self, the internal battle a lead character has within, is often the most powerful.

Answer 2

A) Conflict.

There's an event or character that triggers the conflict.