Predator-prey interactions refer to the relationship between predators (organisms that hunt and kill other organisms for food) and their prey (organisms that are consumed by predators). This field of research seeks to understand how predators and prey influence each other's populations and behaviors, as well as how these interactions impact ecosystems as a whole. Researchers studying predator-prey interactions often investigate factors such as predator hunting strategies, prey defense mechanisms, population dynamics, and the effects of predation on biodiversity. By studying these interactions, scientists can gain insight into the complex and interconnected relationships that exist within ecosystems and how they are influenced by factors such as habitat loss, climate change, and human activities.