Answer:
Mechanical waves
Step-by-step explanation:
Mechanical waves are waves that must have a medium to transfer energy. Without a medium, mechanical waves cannot be propagated in space.
- Electromagnetic waves on the other hand do not require a material medium for their propagation.
- They can move energy through a vacuum.
- Examples of mechanical waves are sound waves, water waves, seismic waves etc
- Examples of electromagnetic waves are x-ray, infrared, light waves.