¿Por qué nos son imprescindibles minerales como el hierro, el cinc, el cobre
y el yodo?

the animal that would be cutest if scaled down to the size of a cat? elephant

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave