Final answer:
The layer described, involving the child's immediate surroundings and interactions, is called the microsystem, which is part of Bronfenbrenner's ecological systems theory.
Step-by-step explanation:
The layer described in the question is the Mesosystem. The mesosystem refers to the interactions between different settings or microsystems that the child is a part of. It involves the connections and relationships between the child's immediate surroundings, such as the school, family, daycare, and other social contexts that directly influence the child's development.
The activities and interaction patterns in the child's immediate surroundings, such as school, family, daycare, and little league team, are considered part of the microsystem. According to Bronfenbrenner's ecological systems theory, the microsystem is the closest environmental layer to the child and consists of the structures that the child has direct contact with. Therefore, the correct answer to which layer is being described is A) Microsystem.