1. (TCO1) The route used to transmit messages is known as: my answer:decoding

encoding
decoding
feedback
noise
channel

2. (TCO1) As Claire tells about her trip to the museum, she notices Emma and Brian yawning. The information that Claire is receiving is known as: My answer: semantics

encoding
semantics
feedback
decoding
noise

3. (TCO1) You are sitting in a classroom listening to a lecture and the fluorescent light bulb is flickering which you find distracting. This is an example of:
My answer is physical noise

psychological noise
selective noise
physical noise
semantic noise

4. (TCO1) You buy a new car and you ask your neighbor, whom you respect, if he thinks you made a good purchase. The primary function of this communication exchange is:
My answer is to influence others

to get your social needs met
to influence others
to enhance and maintain your sense of self
to develop relationships

I don't know about 1 and 3, but 2 and 4 are definitely wrong.

Please go back and check these definitions in your text materials.

for number four. is it to enhance and maintain your sense of self

and number two. feedback?

Yes, I would choose those two. For the others, see this site.

http://en.wikipedia.org/wiki/Communication_noise

1. Channel

2. feedback
3. physical noise
4. Enhance self

1. The correct answer is "channel". The channel refers to the route or medium used to transmit messages from the sender to the receiver. Decoding is the process of interpreting or understanding the message, but the question is asking specifically about the route used.

2. The correct answer is "decoding". Decoding refers to the process of interpreting or understanding the message received. Semantics refers to the meaning or interpretation of words and sentences, but in this context, Claire is receiving the message and interpreting it rather than focusing on the meaning itself.

3. The correct answer is "physical noise". Physical noise refers to any external factors that disrupt the communication process, such as flickering lights, loud background noises, or any other physical distractions. In this case, the flickering light bulb is causing a disturbance during the lecture.

4. The correct answer is "to enhance and maintain your sense of self". In this communication exchange, the primary function is to seek validation and feedback from your neighbor to enhance and maintain your self-image. While influencing others may be a secondary goal, the main purpose here is to receive affirmation and validation for your purchase decision.