When a plant is exposed to pests, volatile compounds are usually synthesized inside its leaves to attract natural enemies of the pests. In general, to protect themselves from pests, the plant adjusts its own odor and exaggerates the degree of damage, thereby attracting more pests. The researchers believe that the discovery is expected to help scientists develop environmentally friendly pest control methods. The one that best illustrates the above phenomenon is:. ['When a certain herbivorous pest eats grass, the grass emits a lavender-like smell to attract wasps, and this kind of pest is just a good meal for wasps.', 'Mirabilis can attract Japanese chafers like magnets. After the Japanese chafers ate jasmine, they were poisoned soon.', 'When diamondback moth larvae invade cabbage, cabbage releases a large amount of volatile substances that are harmful to diamondback moth, thereby driving away diamondback moth.', 'Willow trees attacked by caterpillars will produce resistance substances, willow trees that have not been bitten 3 meters away also produce this resistance substance.']