what type of wave is a microwave?\no heat\no longitudinal\no sound\no transverse

Brief Explanations:

Microwaves are a part of the electromagnetic spectrum. Electromagnetic waves are transverse waves, which means the oscillations of the electric and magnetic fields are perpendicular to the direction of wave propagation. Heat is a form of energy transfer, not a wave type. Longitudinal waves have particle - motion parallel to wave - motion (like sound waves). Sound is a mechanical wave that requires a medium. Microwaves are transverse electromagnetic waves.

Answer:

D. transverse