Which of the following would most likely require a security zone?

A security zone is typically established to protect vital infrastructure, sensitive areas, or assets that could be targeted for threat or harm. Restricted waterfront areas are often critical to national security or public safety, as they may contain military bases, government facilities, or transportation hubs essential for commerce and defense operations. These areas require heightened security measures to prevent unauthorized access, potential terrorist attacks, or other criminal activities.

In contrast, public parks, residential neighborhoods, and popular tourist attractions do not generally face the same level of risk that would necessitate a security zone. While they may have their own security measures, the specific need for a security zone arises primarily in contexts where there is a significant risk to critical resources or safety—characteristics more aligned with restricted waterfront areas. Thus, the need for a security zone is most prominent and justifiable in restricted waterfront areas due to their strategic and sensitive nature.