Answer:
Developmental theory
Step-by-step explanation:
Developmental Theory is the theory that helps in understanding several aspects that lead to the development of a child's language, cognitive skills, and social skills.
This theory gives an insight into the development of a child. Several theories helps us know what shaped a person.
Developmental Theories of theorists such as Mary Ainsworth, Freud, etc helps us understand the significant role of the early years of a child plays in later development of the person. Thus, helping to connect the past and the future.
So, the correct answer is developmental theory.