The human development pattern is:

English: Human development is best described as spiral: it generally moves forward but often revisits earlier stages in a more advanced or refined form. Linear would imply unchanging straight-line progress, which misses the revisiting-and-improving aspect.

Parabolic suggests a specific symmetric mathematical curve and does not reflect the typical pattern of returning at a higher level.

Cyclical implies mere repetition without forward advancement; spiral indicates repetition with progression.