Microsystem, Mesosystem, Exosystem, Macrosystem and Chronosystem are parts of the theory propounded by:

Correct option is C

Bronfenbrenner propounded the Ecological Systems Theory, which includes the Microsystem, Mesosystem, Exosystem, Macrosystem, and Chronosystem. This theory emphasizes how different environmental systems interact and influence a child’s development.
Information Booster:
 The Microsystem includes direct interactions like family and school.
 The Mesosystem refers to connections between microsystems.
 The Exosystem includes external factors like parents’ workplace.
 The Macrosystem encompasses cultural and societal norms.
 The Chronosystem deals with time and life transitions.
Additional Knowledge:
 Maslow (option a) is known for the Hierarchy of Needs theory.
 Vygotsky (option b) proposed the Sociocultural Theory.
 Piaget (option d) developed the Cognitive Development Theory.