is an interference in the channel of communication. a.Sourceb. Feedforwardc. Feedbackd. Noise

d. Noise

Explanation:

Noise is an interference in the channel of communication.

Non-technically, communication noise includes physical noise, psychological noise, and semantic noise. These types of noises affects the communication between humans and can cause misunderstanding.

Technically, Noise can be defined as an unwanted electrical signal that influences the meaningful signal (message).  Noise is random disturbance which can arise from natural phenomenon as well as from other electrical devices nearby.

We have a whole set of frequency spectrum. The range of frequencies for humans is 20 hz to 20 khz. We can use filtration to filter out a range of frequencies and to eliminate noise.

answer; i believe the answer you're looking for is (nanotechnology);

the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.