Two subgroups of motor skills are

• A. Internal and external
• B. Gross and macro
• C. Gross and fine
• D. Motor and sensory

Answer: (C)

Motor skills are categorized by the size of the muscle groups they use and the level of precision required. Gross motor skills involve large muscle groups and broad, whole-body movements like running, jumping, or throwing. Fine motor skills rely on small muscles for precise tasks, such as writing, buttoning a shirt, or manipulating small objects. This is why the two subgroups are gross and fine.

The other pairings don’t fit as standard subgroups of motor skills. Internal and external refer to focus or cues rather than a classification of motor actions. Gross and macro isn’t a typical binary classification in this context, and motor and sensory describe different modalities rather than subcategories of motor skills themselves.