Answer:
D. They both help animals stay out of the way of cars.
Step-by-step explanation:
Wildlife overpasses and underpasses are designed to provide alternative routes for animals to cross roads, reducing their exposure to high-speed traffic and reducing the likelihood of animal-vehicle collisions. These structures help animals to stay out of the way of cars by providing safe passages that allow them to move across roads without coming into direct contact with vehicles. This helps to maintain the integrity of wildlife populations and their habitats by reducing mortality rates and preventing fragmentation of wildlife habitats. Additionally, these structures can also help reduce the risk of human injury or death in the event of an animal-vehicle collision.