Final answer:
The emotional dialogue among the sisters and the mother can affect the plot by building suspense, motivating the family to move, hinting at the story's ending, and causing external conflicts.
Step-by-step explanation:
The emotional dialogue among the sisters and the mother in a story can affect the plot in different ways. In this case, it can actually do all of the options mentioned. The emotional dialogue can build suspense by creating tension and anticipation for what will happen next. It can also motivate the family to move if the discussions are about making important decisions or taking action. Additionally, the emotional dialogue can hint at the way the story ends by revealing the characters' feelings and intentions. Lastly, it can cause external conflicts if the discussions lead to disagreements and arguments among the characters.