Concept:Physical development follows a predictable, orderly sequence, but the speed of development differs from child to child due to individual factors.
Explanation:Development is a lifelong process that begins at conception.
Physical changes happen in a fixed order, such as head-to-toe and centre-to-outwards patterns.
However, every child grows at their own pace.
Heredity, nutrition, environment, and health all affect the rate of physical development.
No two children develop exactly alike.
Thus, although the sequence is orderly and predictable, individual rates vary.
Answer:D. occurs in an orderly and sequential manner but rates of development of individual children vary.