Answer:Waves are a type of energy that can travel through different mediums, such as water and air. There are two types of waves: mechanical and electromagnetic. Mechanical waves require a medium to travel through, while electromagnetic waves can travel through a vacuum. Waves have two important properties: wavelength and amplitude. Wavelength is the distance between two consecutive points on a wave, while amplitude is the height of the wave. Waves can interact with matter in different ways, such as reflection, refraction, and diffraction. Sound waves are a type of mechanical wave that require a medium to travel through, and they can be reflected, refracted, and diffracted just like other waves.