Which of the following are common pests targeted in right of way management?

In the context of right-of-way management, the primary focus is on controlling and managing pests that can negatively impact infrastructure such as roads, railways, and utility lines. The correct choice identifies weeds, insects, and rodents as common targets in this field of pest management.

Weeds are a significant concern because they can obstruct visibility for drivers and can also affect the structural integrity of pathways and roads by encroaching on their edges. Insects can damage various materials and even affect the health of ornamental plants or trees that may be part of the landscaping along these areas. Rodents can cause physical damage to infrastructure, such as chewing on cables or creating burrows that compromise the stability of road surfaces.

The other options, while they include some pests, do not align with the primary concerns in right-of-way management. Fish and birds are typically not involved in right-of-way pest management. Crops and livestock are more relevant to agricultural pest management rather than infrastructure. Grass and flowers may be part of landscaping but do not encapsulate the range of pests managed in the context of infrastructure. Therefore, the identification of weeds, insects, and rodents is crucial to understanding the specific challenges faced in right-of-way pest management.