Adding crash barriers at entrances to parking garages is an example of what?

The correct choice, target hardening, refers to measures taken to make a target (in this case, the parking garage) more resistant to attacks or unauthorized access. Adding crash barriers serves to physically reinforce the structure against potential vehicle attacks or breaches, thereby enhancing its overall security. This strategy makes it more difficult for potential offenders to successfully execute their plans, thereby deterring criminal activity.

In the context of homeland security and crime prevention, target hardening emphasizes proactive defenses, which can include physical barriers, locks, and other deterrents. These measures are designed to increase the time, effort, and risk for an attacker, which can lead to a reduction in crime rates in those areas.

While concepts like target protection, target shielding, and target security relate to overall security strategies and may share some elements with hardening, they focus more on the broader context of security measures rather than the specific action of making a target physically more resistant to threats. Therefore, target hardening is the most precise answer in this instance.