"I adore daddy" and "I don't love anyone in the world but him," directly shows the authors love for their father. In this case, it would be "I adore daddy."
Answer:
Complete sentence.
Explanation:
A sentence fragment is a clause or a group of words that are part of a sentence but do not form or make a complete sentence. They can be best identified by the structure or composition of the sentence, as it will miss either a subject, a verb or an object, or a complete thought. Even if it contains both a subject and a verb, it can sometimes be a sentence fragment.
The given sentence "the author researched the Great Depression" is a complete sentence as it has all the necessary elements of a complete sentence.