Mrs. K, as Bibi's Life Orientation teacher, played a very significant role in Bibi's life because she is one of the people who are in Bibi’s Microsystem.
In Bronfenbrenner’s ecological systems theory, the Microsystem encompasses the immediate environments and relationships that an individual interacts with directly, such as family, peers, teachers, and friends. Mrs. K's involvement in Bibi's life as a supportive teacher directly influences Bibi's personal and social well-being, making her a key figure in Bibi's Microsystem.