How does the conflict that ends in Snowball’s expulsion most advance the plot?

The conflict that ends in Snowball’s expulsion most advances the plot because it propels Napoleon into the position of the new leader. Snowball’s expulsion allows Napoleon to consolidate power and establish himself as the primary authority on the farm, setting the stage for the subsequent events of the story where he employs propaganda and manipulation to maintain control over the other animals. This pivotal moment shifts the dynamics of leadership and governance in the story, driving the narrative forward.