In non-fluent aphasia, what is typically omitted in speech?

In non-fluent aphasia, speech is characterized by significant difficulty in producing language, often leading to the omission of function words, which include prepositions, conjunctions, and sometimes even simple verbs or nouns. Function words are critical for the grammatical structure of sentences but are often neglected in non-fluent aphasia due to the effort and cognitive load required to produce speech. This condition results in a production style that primarily reflects content words, such as nouns and verbs, which convey the main ideas and meaning but may lack the necessary grammatical framework provided by function words.

The other choices, while relevant to language production issues, do not broadly capture the specific pattern of omission that is a hallmark of non-fluent aphasia. Vocabulary diversity may be reduced due to the limited speech output, but it's not the specific element that is typically omitted. Subject-verb agreement and word endings or suffixes might also be challenging but are not the primary linguistic elements that are consistently absent in the speech of individuals with this type of aphasia.