Microwaves and radio waves are employed in radio and satellite communications while infrared waves are used in remote controls and infrared features of new phones and other electrons. However, gamma rays have far too much energy and cause damage to the body. They are not used in communication.
The answer is A.
Explanation:
225=m (2.20m/s2 which give m=16kg I used newtons second law to fins the required average force
