Final answer:
The controlling and issuing of keys and access passes to visitors and workers is an example of access control, which is a part of crime prevention strategies.
Step-by-step explanation:
An example of access control would be the controlling and issuing of keys and access passes to visitors and workers. Access control encompasses physical and logical systems designed to limit access to resources or facilities. In the context of crime prevention, controlling access is a method to prevent unauthorized entry and potential criminal actions. It forms part of the broader prevention strategy within criminology, aiming to change the costs, benefits, or opportunities for committing a crime. While uniformed surveillance might deter crime and searching someone upon arrest is a police procedure once a crime is suspected or committed, issuing access mechanisms directly regulates who can or cannot enter a secure area, making it the most representative example of access control.