Respuesta :
Answer: The correct option is: All of the above.
Sound is a type of pressure wave and as it is a wave, it needs medium to travel. In water, the particles are closer than that in air hence the energy transfer can be faster in water than in air. Sound travels four times faster in water to that compared in air.
In empty space there is absence of air and sound is vibrations travelling through air. There are radio waves and light waves in space but these are not sound and light does not require any medium like air to travel. The light can be seen, radio waves can be interpreted by instruments but sound cannot be heard so there is no sound in space.
