Final answer:
Ecology studies organism interactions and their distribution. A population is a same-species group living together, while a species is a collection of such populations. A community encompasses varying species populations, and a biome includes a community and environment. Spheres denote the biosphere's terrestrial, marine and freshwater ecosystems.
Step-by-step explanation:
In the field of Biology, studying how organisms interact with each other and their environment, and understanding the abundance and distribution of organisms, is termed ECOLOGY. The term POPULATION refers to a group of individuals of the same species that live in a specific locale and influence each other's survival. All populations of a particular kind of organism form a SPECIES.
A COMMUNITY is a compilation of various populations of different species that interact in a specific locale. The term BIOME describes a community of populations in conjunction with their environment. The biosphere, which includes all of these terrestrial assemblages of organisms on earth, along with marine and freshwater ecosystems, are collectively known as SPHERES.
Learn more about Ecological Levels of Organization