Question

noise pollution
what is loud?
decibels, symbolized as db, measure noise intensity levels. the epa and world health organization (who) offer guidelines to prevent hearing loss.
urban areas have various noise sources: transportation, construction, machinery, and household appliances. urban settings tend to be noisier than rural ones due to human - made sounds. while loud, thunder and volcanic eruptions are usually brief and don’t contribute to long - term noise pollution.
decibel levels chart with items like rustling leaves, calling birds, etc. and corresponding db levels
what do decibels, symbolized as db, measure?
options: temperature, noise intensity, wind speed, light intensity

Explanation:

The text about noise pollution and the question about what decibels measure. From the left - hand text, it says "Decibels, abbreviated as dB, measure noise intensity levels". Also, the options: "temperature" is for thermometers, "wind speed" for anemometers, "light intensity" for light meters, while decibels are for noise intensity.

Answer:

noise intensity