What is comprised in the term “sentence fragment”?

A sentence fragment refers to a portion of a sentence that is incomplete in nature; it does not express a full thought or idea independently. This term describes a group of words that may look like a sentence but lacks one or more of the necessary components that would grant it completeness, such as a subject or a verb.

In the context of the question, identifying a fragment as a part of a larger sentence is accurate because these incomplete phrases might require additional information to form a complete thought. For example, “Although I was tired” leaves the reader expecting more information to understand the fully intended idea, thus illustrating the concept of a sentence fragment effectively.

Other options, while related to sentences and their structure, do not align with the definition of a sentence fragment as precisely as recognizing it as an incomplete part of a larger sentence does.