Final answer:
Social media helps expose people to a wide diversity of viewpoints and plays a significant role in shaping people's political knowledge and involvement.
Step-by-step explanation:
Social media has been shown to help expose people to a wide diversity of viewpoints. It allows users to communicate and share information with each other, enabling them to access different perspectives on various topics, including politics. While there are challenges such as the spread of fake news and misinformation, research suggests that social media use is positively correlated with political engagement and participation. Overall, social media plays a significant role in shaping people's political knowledge and involvement.