Final answer:
Ecology is the study of how living organisms interact with each other and with their environment. It involves abiotic and biotic factors and is organized into a hierarchy of levels including population, community, ecosystem, biome, and biosphere.
Step-by-step explanation:
Ecology is the study of how living organisms interact with each other and with their environment. It explores the relationships between organisms of the same species as well as between different species. The environment includes abiotic factors (nonliving aspects) and biotic factors (living aspects).
Ecologists organize the biological world in a nested hierarchy, including levels such as population, community, ecosystem, biome, and biosphere. The biosphere encompasses every part of Earth where life exists, including land, water, and air.