Which of the following statements about radio waves is true?

The statement that radio waves are faster than sound is accurate because radio waves, like all electromagnetic waves, travel at the speed of light in a vacuum, which is approximately 299,792 kilometers per second (or about 186,282 miles per second). In contrast, sound waves travel much slower, at approximately 343 meters per second in air at room temperature. This fundamental difference in speed is why radio waves can transmit information over vast distances quickly, while sound waves are limited by their slower propagation.

The other options are less accurate: for instance, radio waves are not slower than light; they are a type of light wave in the electromagnetic spectrum. While radio waves do react with heat, the statement about them being faster or slower in that context does not apply effectively since heat refers to thermal energy rather than a wave type. Furthermore, radio waves can indeed be shielded, but the extent to which they can be shielded depends on the material shielding them. Hence, only the statement about being faster than sound holds true without exceptions.