Answer:
developmental
Explanation:
Marjorie is interested in change across the life span, she should consider studying developmental psychology, a scientific approach that seeks to understand major life process and change:
growth, personal change and self-consistency
<em>Developmental psychologists see how thoughts, feelings and behaviours of people change according to their age.</em>
<em>They consider several fields to observe change: the physical changes, the changes and development of cognition and socioemotional intelligence. </em>
The always present debate in Developmental psychology goes in that we contrast if nature or nurture is the prevailing cause.
Sometimes genetics seem to play a greater rule, whereas some other cases the nurture or the ambient plays a major role-
In the image you can see a stages of development are shown
