Answer:
Analog,Noise,Digital,less
Explanation:
Analog signal changes continuously with time and moves smoothly.
Due to this analog signal can easily disturbed by noise.
Since digital signal are like square wave due to this digital signals are less affected by noise.
Because the Analog signal changes smoothly, like a sine wave, it can closely mimic a human voice. However, part of the signal can easily get lost to Noise. Because Digital signals are on or off, like a square wave, they best carry information that can easily be converted into numbers. These signals are less affected by noise.
