Respuesta :
Unlike mechanical waves, electromagnetic waves can travel through a vacuum.
Answer:
(d) a vacuum
Explanation:
There is difference between the mechanical wave and electromagnetic wave that
For propagation mechanical wave mechanical wave require any medium as like air, water or any material on he other hand electromagnetic wave can travel in when there is no medium as like space
So electromagnetic wave can travel through a vacuum but mechanical wave dose not
So option (d) is the correct option