Resolute vehemently
infallible
lavish
assail
"Someone stole my treasure, and someone is going to pay!" shouted the monster

vehemently

Explanation:

In this exercise, you're required to use the most appropriate word among the group of answer choices provided. Also, the word that's chosen should make the sentence logical and express a complete thought.

Critically analyzing all of the words provided, the most appropriate word to complete the sentence is vehemently because we were told that the monster shouted.

Vehemently is an adverb and it means to say or do something in an intense, forceful, strong and emotional, passionate, or zealous manner.

Hence, the complete sentence would be written as follows;

"Someone stole my treasure, and someone is going to pay!" shouted the monster vehemently.

its hard for me to see which word is supposed to be in bold. if i knew then i would be able to better.

that you cannot mess with fate and love cannot be controlled