The ability to control large muscle groups like arms and legs is known as _____.

• A. Fine motor development
• B. Gross motor development
• C. Balance
• D. Reflexes

Answer: (B)

Gross motor development describes the ability to use and coordinate large muscle groups, such as those in the arms and legs, to perform broad movements like running, jumping, throwing, and climbing. This category focuses on whole-body control and larger movements, which is exactly what's asked in the question. Fine motor development, by contrast, involves small muscles in the hands and fingers for precise tasks like writing or manipulating small objects. Balance is a skill that fits under gross motor development but isn’t the overall term itself. Reflexes are primitive, automatic movements seen early in life that typically fade as voluntary motor control develops. So the term that best fits the description is gross motor development.