Words that sound like one another but have different meanings are called homonyms. Select the most appropriate homonym for the following sentence.
I wonder if they will change ___ plans?

Their

The correct homonym for the sentence "I wonder if they will change ___ plans?" is their.

The words their, there, and they're are homophones, which means they sound the same but have different meanings. The word their is a possessive pronoun that refers to the people being discussed. The word there refers to a place or location. The word they're is a contraction of the words they and are.

In the sentence "I wonder if they will change ___ plans?", the word their is the most appropriate homophone because it refers to the people who are making the plans. The other homophones, there and they're, do not have the same meaning and would not make sense in the sentence.