Fast I will give branliest

D

Explanation:

It takes 3 different vibrations to hear a sound, since sound is made when things vibrate (or wiggle) : The object that makes the noise vibrates (our bell). The air molecules vibrate as the sound moves through the air. The eardrum vibrates when the sound wave reaches it

Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.

plato users

given bodies of water

pacific / arctic / indian / southern

[ a ] the caribbean sea

[ b ] the northern ocean

[ c ] the atlantic ocean

[ d ] the barents sea

with this being the given answers