When sound waves travel through a medium, the particles of the medium move parallel to the wave motion. which typeof wave displays this behavior?
a. longitudinal waves
b. transverse waves
c. perpendicular waves
d. electromagnetic waves

A. Longitudinal waves

Explanation: The displacement of the medium parallel to the propagation of the wave is a characteristic of longitudinal waves. Longitudinal waves are also characterized by compression and rarefraction.

A wave propagated along the length of a stretched Slinky toy, the increase and decrease of the coil gives a good example of longitudinal wave.

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.