The word class that the word in bracket underlined word in the sentence belong to is the adjective.
The adjective is used to modify a noun and give more information about it. Special as used in the sentence means that the pen or brush us used for something different and particularly designed for a unique purpose.
Answer:Citizens believe that they have the right. This right exists as long as they do not hurt others.They can be whatever they desire. They can do whatever they desire.