A systematic statement of principles and generalizations that provides a framework for understanding how and why people change over time is called a "."

Developmental theory

Explanation:

Developmental theory  is defined as the concept that states regarding the changes, growth and stages that occur in the lifespan of humans.It describes about scientific means that is responsible for different levels occurring in life.

Factors that take place during developmental cycle are with emotional development, cognitive development, social development ,physical development, biological development etc.

Therefore, developmental theory explains the modification and reason behind these changes .

manifest functions are the recognized and intended consequences of any social pattern, while latent functions are those unrecognized and unintended consequences. to analyze the manifest functions of any social institution, we have to study its contribution to the continuation of a group, community, or society.