"천적" (cheonjeok) refers to a natural enemy or predator in an ecological context. It describes organisms that prey on or control the population of other species, helping to maintain balance in ecosystems. For example, a hawk can be a 천적 to mice, as it hunts and reduces their numbers. In agriculture, 천적 can be beneficial for pest control. Farmers may introduce 천적 like ladybugs to manage aphid populations, reducing the need for chemical pesticides. This approach promotes a healthier environment and supports sustainable farming practices.