Final answer:
True. Most rear-end collisions are caused by the vehicle in the back following too closely.
Step-by-step explanation:
True. Most rear-end collisions are caused by the vehicle in the back following too closely. Rear-end collisions occur when the following vehicle does not leave enough space to stop in time if the leading vehicle slows down or stops suddenly. This is known as the tailgating effect. When a driver follows too closely, they have less time to react to changes in traffic and are more likely to collide with the vehicle in front of them.