The plural form of a noun indicates that there is more than one one or subject may it be a place, person, event, animal or an idea. In giving the plural form of the noun, adding s, es, or ies at the end of the noun is usually practiced. In the question above, it is only in letter d. roof =rooves that does form its plural form correctly. The correct plural form of the word roof in the standard English is roofs.
Answer: I am going to say that the answer is number 4.
Explanation: I say that it is 4 because after all Philip is playing a joke on them in the first place which means he like to play and do jokes.
The answer would be theme:)