In which of the following periods does physical growth and development occur at a rapid pace?

Physical growth and development occur at the most rapid pace during infancy and early childhood. During infancy (birth to 2 years), children typically triple their birth weight and grow significantly in height. Early childhood (2-6 years) also shows substantial physical development. Middle childhood shows slower, steadier growth, while adolescence shows another growth spurt but not as rapid as infancy. Adulthood marks the end of physical growth.