Specific normative events are also called age-related standards averages benchmarks developmental milestones

Specific normative events are also called developmental milestones.

developmental milestones

Explanation:

Certain events that occur during a human's lifetime are termed as milestones. It is because these events take place for the first time in the human being's life.

And, mark the beginning of a new ability, a new action that the human can perform then onward. Since there is a development of a new ability/skill with that event, the event is called a developmental milestone.

the answer is a. monarch