The term that describes a government intervention in a market is Regulation.
- Politicization refers to the process of making something political or involving politics, but it is not specifically about government intervention in markets.
- Nationalization refers to the process by which a government takes control of a private industry or assets, but it is just one form of government intervention.
- Command typically refers to a command economy where the government makes all decisions regarding the production and distribution of goods and services, but it is not as broadly applicable as regulation.
Therefore, Regulation is the most appropriate term for government intervention in a market.