Read the sentence.
The heart-shaped mark on the puppy's chest was just one _[blank]_ in my decision to adopt him.
Which word correctly completes the sentence?
To determine the correct word that completes the sentence, we need to look for a word that fits grammatically and semantically. In this case, we are looking for a noun that indicates something that influenced the speaker's decision to adopt the puppy.
One possible word that could complete the sentence is "factor." The word "factor" fits grammatically as a noun, and it also makes sense semantically since it implies something that contributes to a decision.
To confirm that "factor" is the correct word, we can read the completed sentence: "The heart-shaped mark on the puppy's chest was just one factor in my decision to adopt him." This sentence makes sense and conveys the meaning that the mark on the puppy's chest was one of the reasons why the speaker decided to adopt the puppy.
So, the word that correctly completes the sentence is "factor."