Answer:
Stewart goes home is a complete sentence.
Step-by-step explanation:
The traits of a complete sentence are:
A subject
A predicate
Now we can analyze the sentence. Stewart is our subject and goes is our predicate. In that case, we can look for the traits of a run-on sentence:
A longer sentence with two complete thoughts and no comma or coordinating conjunction.
Since "Stewart goes home" is not a run-on sentence, it is our final option. A complete sentence.