Read the sentence. The dog ran fast until his owner stopped it. Look at the sentence diagram. "dog ran fast" is on one line, each word separated by a vertical line. The word "The" is on a diagonal line under "dog." The word "until" is on a dotted diagonal line under "ran." "owner stopped it" is on one line, each word separated by a vertical line. The word "their" is on a diagonal line under "owner." Which element is incorrect in this sentence diagram? “The dog” should be replaced with “their owner.” The word “until” should be replaced by “instead.” The pronoun “their” should be replaced by “its.” “”Ran fast” should be replaced by “stopped it.”