Answer : A mechanical wave is a wave that does not require a medium to transfer its energy.
Explanation :
A wave creates a disturbance in a medium. The wave can be of many types like the mechanical wave, electromagnetic wave etc.
The electromagnetic wave does not require any medium for the transportation of energy.
The mechanical wave is the wave that requires a medium to transfer energy.
There are two types of mechanical wave :
Hence, the correct option is (A) "does not require a medium to transfer".
