Bronfenbrenner's ecological systems theory posits five nested environmental systems. Which of the following lists all five systems?

• A. Microsystem, Mesosystem, Endosystem, Macrosystem, Chronosystem
• B. Micro-, Macro-, Exo-, Endo-, Chronosystem
• C. Microsystem, Mesosystem, Exosystem, Macrosystem, Chronosystem
• D. Microsystem, Exosystem, Macrosystem, Chronosystem, Mesosystem

Answer: (C)

Bronfenbrenner's theory models development through five nested environmental layers, from what’s closest to the child to what is most distant in influence: microsystem (immediate surroundings like family and classroom), mesosystem (connections between those immediate settings), exosystem (indirect influences such as a parent’s workplace), macrosystem (broader cultural values and laws), and chronosystem (changes and time over the life course). The list that presents these five names in the standard nesting order—microsystem, mesosystem, exosystem, macrosystem, chronosystem—fits the model exactly and reflects how each level progressively extends the child’s immediate context. The other options either use an unfamiliar term not in Bronfenbrenner’s model (Endosystem) or scramble the order, which disrupts the idea of nested, progressively widening influence.