What best describes a sound wave? transverse and electromagnetic longitudinal and mechanical longitudinal and electromagnetic transverse and mechanical

Sound needs medium to travel and it can not travel without medium

so sound wave is a travelling wave

now we also know that sound wave propagate in form of rarefaction and compression.

So all medium particles travel in the direction of wave only

so it is a longitudinal wave also

so correct answer will be

mechanical longitudinal

longitudinal and mechanical

Explanation:

It's right on Edge