Biological disaster: refers to the harm or injury to workers caused when handling microbial pathogens or materials containing microbial pathogens and individuals infected with them. Which of the following is a biological disaster? ['Water hyacinth reproduces very quickly. A large number of water hyacinths cover the river surface, which easily causes water quality to deteriorate and affect the growth of underwater organisms. Water hyacinths have appeared in Dianchi Lake and Taihu Lake.', 'In nature, humans and various animals and plants are interdependent, but once the balance is lost, disasters will follow. Birds and snakes in a certain place are hunted in large numbers, resulting in flooding of rats.', 'Due to the abuse of antibiotics, general bacteria have developed drug resistance. After the structure of the manager has mutated, it has become more difficult to treat and become a super germ. In Europe alone, more than 20,000 people are infected every year. knockdown.', 'Due to the drought, the locust plague began to spread, and large swaths of reeds were eaten up by locusts, and swarms of locusts that have not yet grown wings are approaching the nearby grassy beaches and farmland.']