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Why is atmospheric oxygen considered a link between life and energy processes?

Answer and explanation

Correct answer: Because it takes part in both respiration and combustion

The correct answer is B: oxygen participates in both respiration and combustion. In aerobic respiration, cells use oxygen to help oxidise food molecules. This releases usable energy that organisms need for movement, growth, repair, and other life activities. In combustion, oxygen supports the rapid reaction of a fuel, releasing heat and often light. These two examples show why oxygen links biological energy release with wider physical and chemical energy processes. A is wrong because oxygen does not only form dust. C is wrong because oxygen cannot stop gravity. D is wrong because its ordinary atmospheric role is not the destruction of sea salt. Memory cue: respiration releases life energy; combustion releases heat, and both need oxygen.

Related tags

OxygenRespirationCombustionEnergy ProcessesWeathering: PhysicalChemicalAnd BiologicalWeathering Physical Chemical And BiologicalGeomorphic ProcessesGeography

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