Final answer:
An ecosystem is a combination of living and non-living things in a specific area. A population is a group of individuals of the same species in a particular location. A community is a collective of different populations in a specific area. The biosphere contains all ecosystems on Earth.
Step-by-step explanation:
An ecosystem consists of all the living things in a particular area, along with the non-living environment. It includes interactions between organisms and their physical surroundings, such as water, sunlight, soil, and air. A population refers to a group of individuals of the same species living within a specific area. It represents all the members of that species in a particular location. A community is the set of populations inhabiting a specific area, which includes different species interacting with each other. It is the assemblage of multiple populations. Lastly, the biosphere is the entire part of Earth where life exists. It includes all the ecosystems and represents the zones of life on our planet.