What does the 15th Amendment address?

The 15th Amendment addresses the right to vote, specifically prohibiting the federal and state governments from denying a citizen's right to vote based on "race, color, or previous condition of servitude." This amendment was ratified in 1870 as a crucial part of the Reconstruction Amendments, which were designed to secure civil rights for former slaves and ensure their participation in the electoral process.

While the other options relate to important civil rights, they are addressed by different amendments or laws. The free exercise of religion is covered under the First Amendment, the right to counsel is protected by the Sixth Amendment, and protection from discrimination is part of various civil rights laws and amendments but not specifically outlined in the Constitution in the same way. Thus, the primary focus of the 15th Amendment is on voting rights.