Answer: What is missing from the sentence provided is D. a predicate.
Explanation: "The sparkling blue bicycle with the brand new tires and comfortable seat" is a sentence fragment because an essential part of the sentence is missing: the predicate. In other words, <u>the sentence provided does not express a full thought because it needs a predicate, that is to say a verb that indicates what the subject</u> ("The sparkling blue bicycle with the brand new tires and comfortable seat") <u>is or that indicates what is the change that the subject has gone through</u>. For example, the sentence could be completed by adding the predicate "was stolen".