Speech fluency is worst affected with damage to :
Broca’s area
Broca's area lies in the posterior part of the inferior frontal gyrus, usually in the left hemisphere, and is central to the planning and motor programming of speech. Damage here produces Broca's (expressive or non-fluent) aphasia.
A person with Broca's aphasia speaks slowly and effortfully, in short telegraphic phrases with missing function words, even though comprehension is relatively spared. Speech fluency is therefore the function most severely disrupted.
Wernicke's area, in the posterior superior temporal gyrus, produces fluent but meaningless speech with poor comprehension when damaged, so fluency is preserved. The pyramidal tract carries voluntary motor commands to the body and its damage causes weakness, not a language-specific fluency loss. The pontine region is a brainstem area tied to arousal, cranial nerves and motor relay, not to language production as such.
Broca’s area option is correct.
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