Question

type of wave that does not require a medium
electromagnetic wave mechanical wave
longitudinal wave transverse wave

Explanation:

Mechanical waves (like sound) need a medium. Longitudinal and transverse are wave motion types (longitudinal: particle motion parallel to wave, transverse: perpendicular), and both mechanical waves can be longitudinal/transverse. Electromagnetic waves (e.g., light, radio) propagate via oscillating electric and magnetic fields, no medium needed (they can travel in vacuum, like light from sun to Earth). So the type of wave that doesn't require a medium is Electromagnetic Wave.

Answer:

A. Electromagnetic Wave