By amplifying soft sounds but not loud sounds, digital hearing aids produce
a sensory interaction.
b compressed sound.
c subliminal stimulation.
d sensory compensation.
e feature detectors.

The correct answer is b. Compressed sound.

Explanation:

Compressed sound from a technical point of view occurs when a decrease in the range between the sounds that are loudest and the sounds that are the quietest occurs.

During sound compression the dynamic range between said sounds that are quieter and said sounds that are the loudest gets reduced.

This is done by amplifying the quiet sounds and attenuating the sounds that are the loudest.

In this particular case, by amplifying soft sounds but not loud sounds, digital hearing aids produce:

b. Compressed sound.

trade regulation is a field of law, often bracketed with antitrust (as in the phrase “antitrust and trade regulation law”), including government regulation of unfair methods of competition and unfair or deceptive business acts or practices. antitrust law is often considered a subset of trade regulation law. franchise and distribution law, consumer protection law, and advertising law are sometimes considered parts of trade regulation law.

in general the theory of economics says that the more open to trade a country is the better   the result for the same country and the whole economies.

in real life countries impose taxes, quotas, etc which is not so good for the economies.

this kind of commercial war between the usa and china is slowing down the growth of the whole world so we can say that it is a draw back of trade regulations. and the free trade agreements are benefits of trade regulations.

no because it could make the world a terrible place to live in.