Final answer:
The correct answer is C. A child's interactions with their Exosystem. This is not a component of the Developmental Niche, which includes settings, caretaker psychology, and customs of child care.
Step-by-step explanation:
According to Super and Harkness's concept of the Developmental Niche, the component that is not a part of this concept is C. A child's interactions with their Exosystem. The Developmental Niche framework consists of three main components: 1) The physical and social settings of the child's life, 2) The psychology of the caretakers, and 3) The customs of child care and child-rearing. The Exosystem refers to a concept from Bronfenbrenner's ecological systems theory and is not considered a direct part of the Developmental Niche framework.