Final answer:
An ecological interaction is any interaction between organisms with each other or the environment, such as predator-prey relationships and competition for resources.
Step-by-step explanation:
An ecological interaction refers to any interaction between organisms with each other or the environment. It includes various types of interactions, such as predator-prey relationships, competition for resources, and coevolution between different species. Predator-prey relationships, for example, involve one organism (predator) consuming another organism (prey), which helps to maintain the balance of organisms in an ecosystem.