Which type of barrier is designed to rely on weight to prevent entry?

The correct answer is that a passive barrier is designed to rely on weight to prevent entry. Passive barriers are typically stationary structures that do not require any action or input to function. They are designed to physically obstruct access, often using their mass or weight to deter unauthorized entry. Examples include heavy gates, walls, or concrete blocks that are placed in strategic locations to impede movement.

In contrast, active barriers would involve mechanisms that can be moved or activated, like electronic gates or barriers that require human operation or energy sources to function. Moveable barriers can adjust their position or configuration, adapting to allow or restrict passage as needed. Expedient barriers are typically temporary in nature and may include items that are quickly assembled to provide immediate protection or obstruction but may not rely solely on weight for their effectiveness.

The distinction lies in the operational characteristics of the barriers, where passive barriers maintain their effectiveness simply through their physical presence and weight, providing a formidable defense without the need for mechanical or human-assisted operation.