Which of the following figures from history and literature most represente a
monster to you?
The monster created by Dr Frankenstein
O
The vampire Idward in "Twilight"
O Adolf Hitler
O
An evil international corporation
O King Kong
O
A nerial killer
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EN WIP a POND

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."

the simple predicate of the sentence is camped.