How does interaction between helmer and nora advance the plot

Nora has a flirtatious behavior that suggests that Helmer and she have a flirtatious but stable relationship but sometimes it is serious. Helmer supports the careless attitude of Nora with money and he also worries and criticizes her habit of squandering money to make her understand the value of saving. This behavior shows that there is still a lot of love in their relationship and that it is not a couple with a bad mood.

bro we need more information. how are we supposed to answer this?

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).