Dysarthria usually affects which of the following?

Dysarthria is a motor speech disorder that results from neurological injury affecting the muscles that produce speech. It is characterized by weaknesses in the muscles responsible for articulating sounds, leading to difficulties in speech clarity, strength, and coordination. Therefore, the correct answer relates to the range of motion and strength, as these are critical physical aspects that get compromised in individuals with dysarthria.

When the muscles controlling speech are weak or do not move effectively, it impacts how well individuals can articulate words and modulate their speech. As a result, interventions for dysarthria often focus on improving the strength and control of these muscles to enhance communication abilities. The other options, while they may relate to challenges faced by individuals with various disorders, do not directly pertain to the primary characteristics and effects of dysarthria.