Answer :
Final answer:
Freedom of association and freedom to petition the government are key constitutional rights that safeguard the participation of interest groups in the U.S. political system.
Explanation:
Freedom of association is the constitutional right that most protects the role of interest groups in the U.S. political system. This right allows interest groups to come together, organize, and advocate for their shared beliefs and goals. Additionally, freedom to petition the government is another crucial constitutional right that empowers interest groups to address grievances and influence policymakers through petitions.
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