Ecologist Dr. Ryan Park studies urban heat islands—the phenomenon where cities are significantly warmer than surrounding rural areas. He argues that strategic tree planting can reduce urban temperatures by providing shade and cooling through evapotranspiration.
Which data would most directly support Park's argument about trees reducing urban heat?
Urban parks attract many visitors during summer months
Tree planting programs have become more popular in recent years
Heavily tree-lined streets in cities were on average 5°C cooler than streets without trees on the same summer day
Cities with more trees have higher property values
Correct Answer: C
Choice C is the best answer. Direct temperature measurements comparing tree-lined vs treeless streets on the same day.
- Context clues: Park claims trees "reduce urban temperatures."
- Evidence evaluation: 5°C difference on the same day isolates tree effect.
- Verify: Same city, same day controls for weather and location.
💡 Strategy: Climate claims need direct measurements under controlled conditions.
Choice A is incorrect because park visits don't measure temperature. Choice B is incorrect because program popularity doesn't prove effectiveness. Choice D is incorrect because property values reflect many factors beyond temperature.