Answer:
I think its the second one. “Father would appear in our doorway / and make Mother’s lips / curl upward, / lifting them from / a permanent frown / of worries.”
Step-by-step explanation:
I'm not sure what the question means exactly, but I think your asking which one is a cause-and-effect? I think its the second one because the Father standing in the doorway is the cause, and the Mother's lips curl upward is the effect. The others don't have causes or effects. I hope that helps you?