Find the synonym of the underlined word: 

It is believed that the ritual of bedtime stories can stimulate a child’s imagination. 

Concept: 'Ritual' means a non secular or solemn rite which includes a sequence of movements done consistent with a prescribed order. "historical fertility rituals" In this context, "It is thought that the ritual of bedtime tales can stimulate a kid's imagination", 'ritual' means custom or tradition. Hence, choice D is accurate and the opposite alternatives aren't due to the fact they do now no longer offer the precise information.

Hence option D is the correct answer.