Final answer:
Advocacy groups like Rock the Vote and Native Vote work to improve voter turnout in specific demographics, encouraging political engagement and providing information on the voting process.
Step-by-step explanation:
The purpose of advocacy groups such as Rock the Vote and Native Vote is to increase voter turnout and encourage political participation among specific demographic groups. Rock the Vote focuses on mobilizing America's youngest potential voters through music, art, and pop culture, hosting events and leveraging celebrity endorsements to promote civic involvement. Native Vote aims to inform American Indians about elections and boost their participation, working toward fair representation. Both organizations, along with others like the National Council of La Raza and Voto Latino, address race, gender, and class issues related to voter turnout, especially in light of the expected growth of the Hispanic, Asian, and multiracial populations over the next forty years, as noted by William Frey.