Final answer:
Statement C properly defines the biosphere as all life on Earth and its interactions with the environment, and an ecosystem as a community and its physical environment.
Step-by-step explanation:
The statement that provides support for the choice in Part A is C: The biosphere is made of all life on Earth and its interactions with the environment, and an ecosystem is made of a community and its physical environment. This aligns well with our understanding of ecological organization, where a population is all the individuals of a species living within a specific area. A community, on the other hand, is the sum of all populations inhabiting a particular area. Lastly, an ecosystem includes not just the biotic components, such as the community of living organisms, but also the abiotic components like water, soil, and sunlight.