What type of aphasia is characterized by nonfluent speech with a lack of grammar?

Aphasia characterized by nonfluent speech with a lack of grammar is specifically known as agrammatism. Individuals with agrammatism often struggle with the use of grammatical structures in their speech. This condition is commonly associated with Broca's aphasia, where speech output is typically effortful and primarily consists of content words (nouns and verbs) rather than function words (prepositions, articles, and auxiliary verbs). As a result, sentences produced may come out as fragmented snippets that lack proper grammatical construction.

In this type of aphasia, there is a significant reduction in the complexity of speech, with patients having difficulty constructing grammatically correct sentences. This lack of grammatical fluency is a hallmark feature of agrammatism, making it the correct choice for the question posed.