after i edit my video and after it is rendered, there is no audio along with the video, why? it does this every time i go through the render process which takes all night and when i put my rendered video on my cloud, there is no audio, again, why?
None of the DVD or Bluray templates include audio. That's by design, so you render a separate audio file.
In order to dig deeper we would need to see complete media and render properties.