Final answer:
Radio waves work best in noisy environments for reliable data delivery over speed, as they can easily pass through obstacles and are inexpensive to produce.
Step-by-step explanation:
The question mentions a scenario where reliable data delivery is prioritized over speed in a noisy environment, and microwaves are often used for satellite-transmitted information and land-based long-distance transmissions. However, microwaves require a clear line of sight between transmitter and receiver due to the short wavelengths involved. On the other hand, radio waves are suggested as a suitable alternative because they are the lowest-frequency and lowest-energy band of the spectrum, making them relatively inexpensive to produce, and because they are less likely to be absorbed by common building materials. Additionally, radio waves can penetrate noisy environments effectively.
Considering the requirements mentioned, radio waves are typically used in environments where the frequency spectrum is noisiest. They work well in noisy environments like those with crowded roadways where shouting is necessary to be heard. For reliable data delivery over speed in such conditions, low-frequency radio waves are generally preferred as they can more easily pass through obstacles and are not easily absorbed by interstellar dust, gas, or common building materials.