What term describes the act of using objects to limit a person's visibility?

The term that describes the act of using objects to limit a person's visibility is concealment. In various contexts, including law enforcement and emergency services, concealment refers to the deliberate use of materials or surroundings to hide an individual, thus preventing them from being seen. This is often done to protect someone or to obscure their presence from others, particularly in situations involving safety or security.

Obfuscation generally refers to making something unclear or confusing, often in communication rather than in physical visibility. Cover relates more closely to protection from danger or exposure rather than simply limiting visibility. Isolation involves separating someone from others, which does not specifically pertain to blocking visibility. Therefore, concealment is the most accurate term for the action of obstructing a person's view.