What can be the causes of rear-end collisions?

You answered correctly. Rear-end collisions often occur when a driver brakes suddenly and the driver behind is not prepared, which is why unexpectedly heavy braking is a cause. Inattentiveness, such as distraction or not watching the road carefully, reduces reaction time and increases the risk of a collision. Driving too close behind the vehicle in front, known as tailgating, leaves insufficient space to stop safely if the vehicle ahead brakes. To prevent rear-end collisions, always maintain a safe following distance and stay alert.