Final answer:
The family is the primary agent of socialization, teaching children their first system of values, norms, and beliefs.
Step-by-step explanation:
The agent of socialization that usually provides children with their first system of values, norms, and beliefs is their Family.
The family is the primary agent of socialization, where children learn what they need to know about objects, relationships, and how the world works. Parents and extended family members teach children manners, civility, and the ways of thinking and behaving that follow social and cultural norms, values, beliefs, and attitudes.
Through interaction with their family, children are introduced to a system of values, norms, and beliefs that shape their understanding of the world around them.