Dysarthria is characterized by:

Dysarthria is primarily characterized by weakness or paralysis in the muscles used for speech production. This condition arises from neurological issues that affect motor control, leading to difficulty in articulating words clearly. Individuals with dysarthria may struggle with the strength and coordination required for effective speech, making their speech slurred, slow, or difficult to understand.

In this context, the other options focus on different aspects of communication and language, such as coordination issues in speech, comprehension difficulties, and challenges with reading or writing. However, they do not accurately describe dysarthria, which specifically involves the physical production of speech due to muscular impairment. Hence, the defining characteristic of dysarthria is indeed the weakness or paralysis of the speech musculature.