Respuesta :

I believe that the answer to the question asked  above is the mortality rate. They study the dead rate to know the lifespan an individual or a generation.


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Answer:

The correct answer is child development.

Explanation:

A scientific study of how and why human beings transform over the course of their life is known as developmental psychology. It was initially concerned with children and infants, however, the field enlarged to comprise adult development, adolescence, aging, and the whole lifespan.  

In the area of the lifespan, the scientists initially studied the development of a child. The child development covers the psychological, biological, and emotional modifications, which take place in human beings between the birth and the end of adolescence.