Which of the following is least likely to cause bites and itching in an urban setting?

Ticks are least likely to cause bites and itching in an urban setting because they typically prefer more rural or wooded environments where they can easily attach to hosts such as deer or other wildlife. In urban areas, the prevalence of ticks is considerably lower, primarily because they require specific conditions for survival, such as tall grasses and dense foliage.

Mosquitoes, fleas, and bed bugs, on the other hand, are more commonly found in urban environments. Mosquitoes thrive near standing water and populated areas. Fleas often infest pets and can easily spread in urban homes. Bed bugs are notorious for being transported through personal belongings and can be found in various living situations, making them prevalent in urban settings. Thus, while all these pests can cause bites and itching, ticks are the least associated with urban bite issues.