Final answer:
Psychology and sociology (Option A) are the two scientific disciplines that led to the development of family ecological theory. The two disciplines provide a comprehensive view of how families function within various environmental contexts.
Step-by-step explanation:
The development of family ecological theory is principally rooted in the intersection of two scientific disciplines: psychology and sociology.
This multidisciplinary lens allows for a comprehensive understanding of family dynamics within the context of their environment.
Psychology provides insight into individual and group behaviors, emotions, and mental processes, while sociology examines the social structures, relationships, and interactions that shape societal functioning.
Together, these disciplines have converged to formulate theories that address how families interact with, adapt to, and are influenced by their surrounding environment.
Psychology has contributed aspects related to individual and family development, mental health, and interpersonal relationships.
Sociology has offered perspectives on social organization, cultural norms, and social institutions, and their effects on family structures and processes.
The union of these disciplines has facilitated a broader understanding in how environmental factors such as socioeconomic status, community resources, and cultural norms impact the family unit.
Hence, the correct answer is: Psychology and sociology (Option A).