Growth refers to quantitative changes with age, while development refers to qualitative changes leading to maturity. There are two essential factors in an individual's development: maturation of hereditary traits and learning through experience. Developmental psychologists have established several principles of development, including that it follows a predictable sequence, has a unique rate for each individual, involves continuous change, and is most critical during early stages. Child development refers to changes from birth to the end of adolescence, while adolescent development is the transitional period between puberty and adulthood. The rights of children and young persons in the Philippines include rights to a family, well-rounded development, basic needs and care, education, recreation, protection, and care of the state.