Final answer:
Collision insurance covers an impact with another automobile or a tree falling on a parked car during a storm.
Step-by-step explanation:
Collision insurance is a type of auto insurance coverage that helps pay for damages to a car in the event of a collision. It typically covers accidents such as an impact with another automobile, which would be option B. Option A, a tree falling on a parked car during a storm, would also be covered by collision insurance as long as it is considered a collision. However, options C and D, car windows broken out by vandals and theft of a car, would not be covered by collision insurance. These events would typically fall under comprehensive insurance or other types of coverage.