This is between phylum and order in biological classification scheme

A grouping between phylum and order within the biological classification system (Kingdom, phylum, class, order, family, genus, species), where kingdoms are broad, general grouping of organisms and species are more specific groupings. ... An organism composed of a cell or cells that do not contain a nucleus.

class

Explanation:

the other girl copied it off google but it doesnt help, hope this actually helps.

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

ya the other dude is right