Climate scientist Dr. Robert Wong argues that ocean acidification from CO2 absorption poses a greater threat to marine ecosystems than rising water temperatures.
Which comparative data would best support Wong's prioritization?
Ocean pH has decreased since industrialization
Coral bleaching from warm water has been documented
In controlled experiments, ocean acidification killed 40% of shellfish larvae at levels expected by 2050, while temperature increases projected for 2050 reduced survival by only 15%; acidification also affected 10x more marine species across food chains
Both factors affect marine life
Correct Answer: C
Choice C is the best answer. Direct comparison: 40% vs 15% mortality + 10x more species affected proves acidification is worse.
- Context clues: Wong claims acidification is "greater threat" than temperature.
- Evidence evaluation: Controlled experiments with same timeframe (2050) allow direct comparison.
- Verify: Both quantitative impact (40% vs 15%) and scope (10x species) favor acidification.
💡 Strategy: "Greater than" claims need controlled comparisons on the same scale.