Answer: Stage 7: Generativity versus stagnation
Explanation:
The above question is the 7th stage in Erikson's stage of psychosocial development. This stage normally happens in adult when they're between 40 - 65 years.
At this stage,they want to make a positive impact on the society. This that can do in the form of parenting of children just like the one Sarah is doing in the question. Sarah enjoys reading bedtime stories to the young children housed. This is her own way of contributing positively to the world.