Final answer:
Freedom of expression is primarily limited by censorship, which involves the suppression of speech or other public communication. While other options provided pertain to economic and property regulations, censorship directly affects the ability to express ideas and information.
Step-by-step explanation:
Freedom of expression can be limited by several factors, but in the context of the options provided, censorship is the direct answer to the question. Censorship may involve the suppression or prohibition of any parts of books, films, news, etc. that are considered obscene, politically unacceptable, or a threat to security.
The government may enact laws that limit certain kinds of speech or expression to protect other rights or public interests, such as obscenity, libel and slander, fighting words, and subversive speech. However, laws limiting speech must be content neutral, meaning they cannot target specific subject matter.
On the other hand, price fixing, antitrust laws, and land-use laws typically relate to economic regulations and property rights. Price fixing refers to an agreement among competitors to set prices; antitrust laws, like anti-monopoly legislation, aim to preserve fair competition among businesses; and land-use laws deal with the regulations concerning how land can be used.
It is essential to recognize that governments can restrict the expression in specific instances and that public disclosure can be a method to prevent market failures. When the government sets limitations on companies and industries, it's doing so to prevent anti-competitive practices that can harm the economy and consumers. Yet, it's crucial for these regulations to be fair and for firms to understand the laws in advance.