Motor development of infant refers to

• A. How they grow taller.
• B. How they learn to speak.
• C. How they feed themselves.
• D. How they move and manipulate objects.

Answer: (D)

Motor development in infancy is about how a baby learns to move their body and use their hands to interact with the world. It covers both large movements (rolling, sitting, crawling, walking) and fine motor skills (reaching, grabbing, and manipulating objects). This focus on movement coordination and object manipulation sets it apart from growth in height, which is physical size, or from language development like speaking, or from general activities like feeding. So describing motor development as how they move and manipulate objects best captures what this area studies.