Answer:
The correct answer is: Skiing in Switzerland
Step-by-step explanation:
Let's understand, semmantically, and gramatically, each words in this sentence. First of all we have the subject "She". It's a personal pronoun and it means that it replaces a name. The seconde one is a verb "Dreams". We have "s" on the final of the verb because we have a singular third person on the present and because of that you need to conjugate the verb adding "s". The third one is a preposition "OF", that works to linking sentences. Finally we have the sentence with gerund. In this sentence, when you use a gerund, you want to show that it's something that this person makes as a routine, something that this person does.