It depends on whether you want the possessive form of porcupine (singular) or porcupines (plural) because there is a difference.
1. singular porcupine: just add an apostrophe followed by -s: porcupine's
2. plural porcupines: just add an apostrophe (not followed by -s): porcupines'
That he is only dreaming that the world would be like how he imagines it to be. He wishes it was like that but it isn't.
The predicate nomiative is son. Hope this helps!
Answer:
The first three answers.
Explanation:
Those three are the only ones that reasonably affect the authors words.
