What requires government interference with an individual's freedom of movement, even if slight?

The concept of a "seizure of a person" is rooted in the Fourth Amendment, which protects individuals from unreasonable searches and seizures. A seizure occurs when law enforcement or government officials exert physical control over an individual, leading to a restriction of that person's movement. Even a minimal interference qualifies as a seizure if it restricts the individual's freedom to walk away or continue with their activities.

In the context of government actions that limit an individual's mobility, a seizure can happen through various means, such as stopping a person on the street or detaining them for questioning. This applies regardless of whether the individual is formally arrested or even charged with a crime. The guiding principle is that any action taken by authorities that halts a person's mobility qualifies as a seizure, emphasizing the need for constitutional protection against unwarranted interference.

While options like an arrest or a traffic stop are also actions that result in interference with movement, they are specific types of seizures. A seizure of a person broadly encompasses any situation where movement is restrained by government action, even in a minimal way. This makes it the correct answer, as it aptly describes the legal principle of what constitutes a seizure under the Fourth Amendment.