Changing norms and values about fertility occur at what stage of demographic transition?

Second stage

Explanation:

Demographic transition -

It is the model , during the development of the country , i.e. , from the pre - industrial to the industrialized economic system , the movement from higher birth and death rates to the lower birth and death rate of the country , is referred to as Demographic transition.

According to this theory , the birth and death rates are interconnected with the stages of the industrial development.

According to the stage 2 of the Demographic transition -

It is referred to as the developing country phase .

The death rates reduces because of better food supply and improved sanitation , as it decreases the diseases.

Hence, from the given statement of the question,

The correct stage of demographic transition is the second stage.