It required a direct line of site between devices. Hope this helps!
The sender forms an idea.The sender encodes the idea in a message.
We use analog and digital signals in our everyday lives with the radio, the cell phone and with our own computers. our computers and our cell phones are all digital now but radio's are still considered analog. Radio telescopes explore space by using radio waves and signals to almost like scan space and collect data like a sonar in a submarine.
Answer: College
Explanation: I got it right on my quiz
