The study of the relationships between living organisms and their physical environment is called ecology. This discipline examines the interactions between various species, their habitats, and how they coexist within ecosystems. It also involves the study of energy flow and nutrient cycling in the environment. Ecologists analyze factors such as population dynamics, community structure, and the effects of human activity on natural habitats. By understanding these relationships, ecologists can contribute to conservation efforts and the sustainable management of resources.