The part of a radio that you speak into is known as

• A. Speaker
• B. Antenna
• C. Joystick
• D. Microphone

Answer: (D)

The microphone is the input element that captures your voice and converts it into an electrical signal for transmission. In a radio, this signal is used to modulate the carrier wave so your voice can be broadcast. A speaker, by contrast, is the output device that turns electrical signals back into sound for you to hear. The antenna handles sending and receiving radio waves through the air, not voice capture. A joystick is a control input used for navigation or control, not for speaking into the device. So the microphone is the part you speak into.