Question

1. drivers of passenger vehicles are at significant risk of serious injury and death when colliding with: a. trains b. bicyclists c. domestic animals d. skateboarders

Explanation:

Trains are much larger, heavier and faster - moving compared to passenger vehicles. A collision with a train can cause severe damage to the passenger vehicle and put the drivers at a high risk of serious injury or death. Bicyclists, domestic animals and skateboarders, while still dangerous to collide with, do not pose the same level of extreme risk as trains due to their smaller size and lower mass - momentum compared to trains.

Answer:

a. Trains