Which item falls under prohibited substances in detention facilities?

Cellular devices are classified as prohibited substances in detention facilities primarily due to security concerns. These devices can facilitate communication with the outside world, potentially allowing inmates to continue criminal activities or orchestrate escape plans from within the facility. Their presence can also disrupt the order and safety of the detention environment, as they enable unauthorized contact that can lead to further complications, including the sharing of sensitive information or the coordination of illegal activities.

In contrast, the other items such as fruits, books, and clothing are typically allowed in detention facilities under specific regulations. Fruits may be permitted as part of meal provisions, books can serve educational and recreational purposes, and clothing is essential for basic human needs. Thus, the presence of cellular devices poses a unique security risk that justifies their prohibition in these environments.