Final answer:
Most rear-end collisions are caused by the vehicle in the back following too closely.
Step-by-step explanation:
The statement is true. Most rear-end collisions are caused by the vehicle in the back following too closely. When a car is following another car too closely, it leaves little to no reaction time if the front car stops suddenly. This can result in a rear-end collision. It is important to maintain a safe following distance to avoid such accidents.