Answer: Fragment (missing predicate)
Explanation:
A sentence fragment is a sentence that is missing either its subject or its main verb.
The answer to this one is D. This is because the sentence does not have a predicate. A sentence's predicate describes what is happening. A sentence is considered a fragment if it lacks a predicate. Consider the following example:
My cousin Fred.
We know Fred is the subject of this phrase, but we have no idea what he's up to. As a result, this isn't a complete sentence.
As "three fish and a turtle" has 2 subjects, the three fish and the turtle, but no predicate to show what they're doing, the sentence is a fragment missing a predicate.
