Answer:
incorrect because it is not joined correctly
Explanation:
A simple sentence is one that has only one clause in its composition. A compound sentence is a sentence where two independent simple sentences have been joined by a coordinating conjunction to form a single sentence. Accordingly, we can see that the writer formed an incorrectly composed sentence, since the writer joined the two simple sentences with the conjunction "and" which is not the appropriate conjunction, and the writer should have used the pronoun "it" instead of "he" to refer to the dog.
The correct sentence would be: "The family's pet dog smelled smoke in the house, so it woke the family by barking."
