Final answer:
The term for the suppression of reading materials on moral grounds is censorship, not libel. Libel refers to defamatory writing, while censorship applies to material considered objectionable for various reasons, including morality. This is a point of debate related to freedom of expression and its limits.
Step-by-step explanation:
The removal, suppression, or restricted use of reading materials on the grounds that they are objectionable for moral reasons is not described by the term libel. Libel refers to a false and unprivileged publication by writing, printing, picture, effigy, or other fixed representation to the eye, which exposes any person to hatred, contempt, ridicule, or obloquy, or which causes him or her to be shunned or avoided, or which has a tendency to injure him or her in his or her occupation. The correct term for the suppression of material on moral grounds is censorship.
Censorship often involves materials that are considered obscene, a challenge to religious beliefs, politically controversial, or a threat to security. It becomes a point of contention when it impacts the freedom of expression, which is a fundamental right protected by the First Amendment in the United States Constitution, though this right is not absolute. Certain forms of speech, like obscenity, libel, perjury, and threats to national security are exceptions to this protection.