what is the difference between mechanical wave and electromagnetic wave?

what is the difference between mechanical wave and electromagnetic wave?
Answer
Brief Explanations:
Mechanical waves need a medium to propagate, like sound in air or water waves. Electromagnetic waves can travel in a vacuum, such as light. Mechanical waves are caused by vibrations of matter, while electromagnetic waves are due to changing electric and magnetic fields.
Answer:
Mechanical waves require a medium for propagation and are caused by matter - vibrations. Electromagnetic waves can travel in a vacuum and are due to changing electric and magnetic fields.