Answer:
Normative history-graded influences
Explanation:
Events or influences that affect the development of many people of varying ages at the same time (for example, the proliferation of smartphones, or living through a major hurricane or natural disaster) are considered Normative history-graded influences.
Normative history-graded influences are those influences within the life course that are correlated with historical time and are experienced by the majority of a culture. Examples are wars, disease epidemics, the proliferation of smartphones, or living through a major hurricane or natural disaster.