Which decision established limitations on school board's authority to remove books?

The Pico v. Island Trees decision is significant because it addressed the boundaries of school board authority regarding the removal of books from school libraries. The Supreme Court ruled that school boards cannot remove books solely based on their content or ideas expressed within them, as doing so would violate students' First Amendment rights. This case established that while school boards have a degree of control over educational materials, they cannot exercise that authority in a manner that discriminates against the ideas or viewpoints presented in those materials.

The other choices, while related to education and First Amendment rights, focus on different aspects. The United States v. American Library Association ruling deals with government funding and access to internet materials in libraries, Tinker v. Des Moines centers on student speech rights in school, and Hazelwood v. Kuhlmeier addresses censorship of student publications. None of these directly address the limitations on the removal of books by school boards in the same way that Pico v. Island Trees does.