Answer:
My best guess would be B due to the fact of friction in a simple machine
Radio waves and visible light, as we perceive it, are both part of the EM spectrum. The only difference between them in terms of our perception is that we don't have receptors to 'see' radio waves. That's where radio receivers come into the picture*, to convert radio waves into sound impulses that we can hear.
All of the change that living things undergo as they grow is called development. That is the name when the changes are within a single unit and over a period of time as short as a lifetime. When the change occurs over thousands of years then it's called evolution.
There are no necessary conditions there’s always waves the ocean is never still or if your talking about a lake you need movement
The answer to ur question is: B
