Final answer:
The microsystem in Bronfenbrenner's ecological systems theory refers to the immediate settings where a child interacts with others, including at home and school.
Step-by-step explanation:
According to Bronfenbrenner, the microsystem involves the interactions of the child and other people in the immediate setting, such as the home, school, or peer group. Bronfenbrenner's ecological systems theory is foundational to understanding how various environmental systems impact an individual's development. The microsystem is the innermost level and is comprised of the settings where an individual has direct social interactions with others, such as family members, classmates, and teachers. These interactions are crucial for development, as they influence how children view themselves and their world.