Based on observations of children of all ages, gesell concluded that a. children achieve most when pressured and pushed. b. children do not need experiences to develop. c. children need structured learning environments. d. parents should not push their children, as growth occurs naturally.

The answer is D.
Based on observations of children of all ages, Gesell concluded that parents should not push their children, as growth occurs naturally. Arnold Gesell believed that children develop through stages in a natural manner. The personality of children is an outcome of continuous growth, their body system established by phases and natural order.

My opinion is that it doesn't