Concept:Political socialisation is the process by which individuals acquire political attitudes, values, and beliefs.
Among all agents, the family is regarded as the most effective because it is the first point of contact in a child's life.
Explanation:The family exerts the earliest and most continuous influence on a person.
Parents and guardians shape a child's initial political identity and loyalty.
This early foundation is deeply emotional and long-lasting.
Though peer groups, schools, and mass media also influence political views, they act after the family has already formed the base.
Therefore, the family is the most effective agent of political socialisation.
Answer:A. family