Which principle explains why a child first learns to sit before walking?

Concept

Development follows an organized sequence: foundational abilities generally emerge before more complex abilities.

Children may differ in pace, yet the usual order of major developmental milestones remains relatively predictable.

Application

Sitting requires postural control and trunk stability. Walking requires these foundations plus coordinated balance and movement, so sitting generally develops earlier.

Contrast

• Continuity emphasizes that development keeps progressing over time; it does not identify the order of specific milestones.

• Individual variation explains why children may reach milestones at different ages; it does not replace the usual sequence.

• Experience influences practice and learning conditions, but the example specifically compares the order of two motor milestones.

Cross-check

Standard motor-development progressions place independent sitting before independent walking, matching an orderly milestone sequence.

Therefore, the governing principle is that development is sequential and orderly.