Which of the following is NOT a recognized cause of wildfires?

The assertion that wind is not a recognized cause of wildfires is inaccurate. Wind plays a crucial role in the spread and intensity of wildfires, acting as a carrier of fire and embers, which can ignite new fires in other areas. High winds can cause fires to spread rapidly, making them more difficult to control.

In contrast, sunlight and glass refraction can act as a cause of wildfires when certain conditions are met, such as sunlight hitting glass objects that can focus and concentrate light onto combustible materials. Lightning is a well-documented natural cause of wildfires, especially in forested areas. Controlled burns, although intentionally set, can lead to wildfires if not managed properly, identifying them as a recognized cause in certain scenarios.

Therefore, the correct answer to the question regarding which item is NOT a recognized cause of wildfires indicates a misunderstanding of the notable contributions of wind to wildfire dynamics.