Final answer:
Urie Bronfenbrenner advocated for studying child development within the context of an ecological systems theory, which encompasses two-way interactions with parents as part of a broader set of influences on development.
Step-by-step explanation:
Urie Bronfenbrenner's Approach to Developmental Psychology
Urie Bronfenbrenner is best known for his ecological systems theory, which looks at children's development within the context of the system of relationships that form their environment. Bronfenbrenner's theory suggests that a child's development is influenced by a number of different social relationships at varying levels of closeness to the child, including not only the interactions with parents but also their school, neighborhood, and even broader societal factors. His approach considers the dynamic interactions between a child, his or her immediate environment, and the effect of the larger social environment on their development. Therefore, the method of study advocated by Urie Bronfenbrenner is not contained in any single straightforward answer from the options provided, but it most closely aligns with b) Studying two-way interactions between a child and his or her parents, as this is a critical component of his ecological systems theory, although it does not completely encompass his comprehensive multi-layered approach.