Which of the following decreases as a result of effective foot patrols?

Effective foot patrols are known to foster a stronger sense of community and increase visibility of law enforcement in neighborhoods, which plays a crucial role in crime deterrence. When officers are present on foot, they are more accessible to residents and can engage in proactive interactions, building trust and rapport. This visibility often leads to a reduction in crime rates as potential offenders may be discouraged by the knowledge that police are regularly patrolling the area and are more likely to intervene if they witness suspicious behavior.

The other options, while potentially related to the context of policing, do not directly correlate with the reduction occurring due to foot patrols. Community outreach programs, for example, might benefit from foot patrols but are not a direct result of them. Similarly, suspicion among officers or patrol frequency does not inherently decrease as a result of foot patrols, as those elements pertain to different aspects of policing and do not directly link to the effectiveness of foot patrols in reducing crime.