What is the term used to define the specific changes and increases in a child's physical size, such as height and weight?

The term that specifically defines the changes and increases in a child's physical size, such as height and weight, is "growth." Growth refers to the measurable physical changes that occur as a child develops, including increases in size and mass. This concept is often quantified through various metrics like centimeters or pounds, making it a precise way to assess a child's development over time.

In the context of child development, growth is a fundamental aspect that is distinct from other terms such as maturation and development. While maturation refers to the process of becoming mature, involving changes in the child’s physical and psychological state, growth solely focuses on physical changes. Development encompasses a broader spectrum of changes, including cognitive, emotional, and social aspects, along with physical growth. Progression implies a movement forward or advance in skills or stages but does not specifically address physical size changes, further distinguishing growth as the most appropriate term for this question.