Read the passage below carefully and match each statement to its corresponding structural role within the author's argument.
Passage:
For decades, marine biology operated under the solar paradigm, asserting that all complex ecosystems depend fundamentally on sunlight-driven photosynthesis. The discovery of deep-sea hydrothermal vent communities in the late 1970s shattered this assumption, revealing thriving biological assemblages fueled entirely by chemosynthesis. Specialized sulfur-oxidizing bacteria form the primary producers of these subterranean oases, harvesting chemical energy from inorganic compounds like hydrogen sulfide emitted by sub-seafloor magmatic activity. Higher organisms, such as giant tube worms (*Riftia pachyptila*) and hydrothermal limpets, have evolved obligate symbiotic relationships with these microbes, lacking functional digestive tracts in adulthood. Beyond revolutionizing oceanography, these extreme environments provide invaluable analogues for astrobiological research, suggesting that life in the universe might proliferate in lightless planetary oceans, such as those beneath Europa's icy crust, independent of stellar radiation. Consequently, protecting these fragile, non-renewable benthic habitats from deep-sea mining is now recognized as a critical global priority.
Which of the following correctly pairs each statement from the passage with its structural function in the argument?
- The discovery of hydrothermal vent ecosystems disproved the universal necessity of sunlight for sustaining complex life.Central Thesis: The core claim that overturns an established scientific paradigm.
- Sulfur-oxidizing bacteria synthesize chemical energy from hydrogen sulfide released by sub-seafloor magmatic activity.Primary Supporting Evidence: The foundational biochemical mechanism explaining how the ecosystem functions.
- Adult giant tube worms lack functional digestive tracts and rely entirely on microbial symbionts.Specific Illustrative Detail: A concrete example of organismic adaptation within the ecosystem.
- Hydrothermal vents serve as terrestrial analogues for evaluating potential life in lightless extraterrestrial oceans.Extended Application: A broader scientific implication derived beyond the immediate domain.