Final answer:
Life emerges at the cellular level (option A), which is where biology marks the beginning of life. The biological hierarchy includes levels from the molecule to the entire biosphere, with the biosphere being the most inclusive.
Step-by-step explanation:
Life emerges at the cellular level (Answer A). The biological hierarchy delineates the complex structure of living organisms, beginning from the smallest, the atom, moving up through molecules, organelles, cells, tissues, organs, organ systems, and organisms. A complete organism is capable of independently performing all physiological functions necessary for life.
The correct sequence representing the hierarchy of biological organization from the most inclusive to the least complex level is answer D: biosphere, ecosystem, community, population, organism, organ, tissue, organelle, and molecule. The biosphere encompasses all ecosystems on Earth, while the cellular level marks the threshold where biology considers life to begin.