The modifiers used in the given sentence is -: Realizing that she could not sleep, Amy decided to get up, take out the trash, and walk the dog. Thus, option 3rd is correct.
Any word or the phrase that is being changed or transformed to the next level and gives the facts about the another word in the same sentence is called as Modifier.
The only appropriate use of a modifier in this sentence is a modifier phrase that describes Amy's difficulty falling asleep. Therefore, The option 3rd is correct.
Learn more about Modifier here:-
https://brainly.com/question/20905688
#SPJ1