Concept:Physical development follows the law of rapid growth, especially during early infancy and puberty, when the body undergoes fast changes in size and motor skills.
Explanation:Physical development includes growth in height, weight, and organ size, as well as control over muscles.
The law of rapid growth states that growth happens in two main phases.
Phase 1 is from birth to about 2 years, where growth is very fast, though the rate slows down gradually.
Phase 2 is from about 2 years until puberty, where growth happens at a steady, constant rate each year.
Puberty is another period of rapid physical change as the body matures from child to adult.
Other options are not primary laws of physical development.
The law of difference from mental development, law of irregular development, and law of relation to imagination and emotional development are not considered primary laws of physical growth.
Thus, among the given choices, the law of rapid growth is the correct primary law.
Answer:C. Law of rapid growth