In the winter of 2008, more than a third of commercial beehives in the U. S. developed a colony collapse syndrome. All worker bees in some colonies suddenly disappeared or died, leaving only lone queen bees in the honeycomb. This syndrome has been passed on In many countries in Europe, such as France, Belgium, Italy, Portugal and Spain, etc. Without these bees, many crops related to human life would not exist, such as soybeans, cotton, apricots, sunflowers, etc. Almost a third of the world Food is all related to the behavior of bees. If they become extinct, it will be followed by severe food shortages, severe social problems such as hunger, violence and riots. The following cannot be derived from the original. ['Queen bees are more resistant to ethnic breakdown syndrome than worker bees.', 'U. S. colony collapse syndrome predates Europe.', 'Swarm collapse syndrome can cause serious social problems.', 'Lack of food is the main reason for the disappearance of worker bees.']