From the options provided, the complete gerund phrase in the sentence is:
B. <span>hanging curtains or shades on a window</span>
Gerund is a word which is in its -ing form. It is derived from a verb but acts as a noun.
Your answer would have to he A. Noun..
because if "puppy" is underlined then its dealing with a person 'person' 'place' or 'thing' but in this category its a 'thing'. (:
Harry Potter was born on 31 July 1980