Final answer:
Families, social groups, and schools are indeed significant agents of political socialization, influencing people's political identities and beliefs throughout their lives.
Step-by-step explanation:
The statement that families, social groups, and schools are important institutions where people are politically socialized is true. These agents play a significant role in shaping individuals' political identities, influencing opinions, attitudes, and behaviors towards politics. Family, being the primary agent, has a profound effect that can last a lifetime, as seen in how children can sometimes influence their parents' perspectives, like in the case of Greta Thunberg and her family. Schools provide education and help instill civic values despite their influence often reflecting the socio-economic environment of the family. Similarly, social groups and the media play a role in transmitting cultural norms and political ideas, contributing to an individual's political socialization process.