Information and IdeasEasy–MediumSupporting a claim about urban trees
Information and Ideas practice question
City foresters claim that street trees meaningfully reduce summer heat at ground level. ____
Which finding, if true, would most directly support the researchers' claim?
- A. Streets with mature tree canopies measured several degrees cooler on summer afternoons than treeless streets nearby.Correct
- B. Residents of tree-lined streets reported watering their gardens more often.
- C. The city planted more trees last year than in any previous year.
- D. Tree-lined streets had older housing stock than treeless streets.
Answer: A. Streets with mature tree canopies measured several degrees cooler on summer afternoons than treeless streets nearby.
The claim is that street trees reduce summer heat; a measured temperature gap between treed and treeless streets supports it directly.
Why the other answers are wrong
- B. Residents of tree-lined streets reported watering their gardens more often.
- Garden watering habits do not measure street temperature.
- C. The city planted more trees last year than in any previous year.
- Planting totals say nothing about temperature effects.
- D. Tree-lined streets had older housing stock than treeless streets.
- Housing age is a confound, not support for a cooling effect.
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