I think the words underlined once are the subjects, and the words underlined twice are the predicates.
The death of a loved one is a disaster that nature cannot heal.
Answer: A
Explanation
Nature will not heal that wound that is left after losing a loved one.
Even though nature creates fascinating patterns, it will not close the wound left.
However, time will be the determinant of the healing process.
This is because the effect of losing someone is eternal, and it is time that will heal the wounds.
Ultimately, nature will only create shorter healing, but once the one forgets about life, the injuries will be still fresh.
Therefore nature does not repair everything.
It suggests that Groucho believes the writer of the original letter knows as little about the city of Casa- blanca (his history is filled with absurd details) as he knows about how different the Marx Brothers' film A Night in Casablanca would be from the famous Casablanca.