Dr. langley's work is devoted to understanding constancy and change throughout the lifespan. dr. langley's field of study is

Dr. Langley field of study is "developmental science"

Developmental science  focuses on the study of human development that integrate a more traditional approaches from the fields of Developmental Psychology and Human Development. Uniquely, developmental science studies human progression or development across the lifespan, from their biological, cognitive to their socioemotional.

This question is an opinionated one, and we don’t know anything about the module or anything, thus we can not answer it. but if you are having trouble on what it is asking basically it is just asking to (using your knowledge on the topic) say which topics you were most interested and which were the most challenging.hope this : p

The answer is congress