Final answer:
A two-year-old child would be categorized as a toddler, which is the developmental stage for children aged one to three years old, characterized by rapid growth, motor development, and language acquisition.
Step-by-step explanation:
The patient in question is two years old and would be considered a toddler. A toddler is defined as a child aged one to three years old, who is undergoing significant developments in physical, cognitive, and psychosocial areas. This phase follows infancy, which refers to the first year of life after birth. This period is characterized by children learning to walk or "toddle," hence the name. Growth is still relatively rapid in toddlers but begins to slow down compared to the infancy stage. Additionally, toddlers experience a lot of motor development, starting to run and climb steps, and are also developing language skills, often beginning to string words together into simple sentences. By contrast, a neonate is a newborn infant during the first four weeks after birth, and an infant refers to a child between the end of neonate period and before their first birthday. A preschooler, on the other hand, would be categorized as a child who is typically older than three years of age and is approaching or attending preschool.