Answer:
Answer for this question is D
Explanation:
Help flies
The answer to this is Optical mouse.
The reason the answer is optical mouse is because the optical mouse is a computer mouse which uses a light source, typically a light-emitting diode, and a light detector, such as an array of photodiodes, to detect movement relative to a surface.
Hope this helped :)
have a great day
ICS would bet he answer.
Good luck! (:
