Final answer:
No governmental agency is specifically responsible for regulating newspapers and magazines, as print media is mostly unregulated due to First Amendment protections.
Step-by-step explanation:
The governmental agency responsible for regulating most aspects of electronic communications, including radio and television, but not print media such as newspapers and magazines, is the Federal Communications Commission (FCC). The FCC regulates interstate and international communications by radio, television, wire, satellite, and cable. The print media, which includes newspapers and magazines, are largely unregulated and enjoy freedom of the press as guaranteed by the First Amendment. Slander and libel are not protected, but there is no Federal Press Regulation Commission (FPRC) to oversee print media content. Therefore, the correct answer to the question is that no such specific government agency is solely responsible for regulating the content of newspapers and magazines.