Emphasizing how happy the family is, i believe.
After her death, Victor seems to feel remorse and guilt because he is aware of what he did, because of the monster he created two family members are dead. Bu, at one point, these feelings turned into anxiety, it might give the reader the idea that he is impossible to figure out. This attitude might foreshadow what happens in Geneva and his decision of keeping the monster alive. It might be interpreted that more obscure things are about to happen.
Its most likely that the father believes that his son has chosen a self destructive-path
The purpose a plot could serve is the events that make up the story/essay
Your eyes, because if you are asleep it means that your eyes are closed and it would be hard to see where you are going.