What characteristic is shared by both inceptisols and entisols, the soils of flood plains?

Inceptisols and Entisols are generally young soils with limited development. Entisols have little or no horizon development, while Inceptisols have begun to develop weak horizons. Thus, both are only beginning to develop horizons and a soil profile; they are not at the final stage of soil development.

AI-written and checked against the verified answer.