Particles in a wave move in an elliptical or circular motion. question 4 options: sound longitudinal transverse surface

The sentence can be completed as follows:
"Particles in a SURFACE wave move in an elliptical or circular motion". So Answer D is the correct one.

Explanation: surface waves are waves that move in circular or elliptical motion at the interface between two mediums (for example, between water and air). An example of surface wave is the wave obtained when you throw a stone in the water: the wave produced when the stone touches the water is a surface wave, that moves with concentrical circles around the source.

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