copy audio clip from one track to another in Premier elements 2021

Hold down ALT and select audio in Track 2

Hold down Ctrl and drag audio to where ever you want in Track 1 (it wont copy but rather overwrite).

Done

Please follow below steps:

1. Copy the section of audio from 2nd video track (Use Ctrl + C)

2. Now move your timeline playback shuttle to the end of the project 

3. Press Ctrl +V

4. Now you can move the copied content wherever you want.

I've had moments where right clicking didn't show a "Paste" choice.  However, the ancient and old pre-windows practice of "CTRL+V" worked every time.   It will put whatever in in the "clipboard" on the selected track where the play head is.   In some cases I've put a duplicate on the same track as the original and then moved it to where I wanted.

To separate an audio segment of a video from its video segment, right-click and select the option.

To copy a clip and paste it on your timeline, right-click and select copy, then right-click on the timeline and select Paste. The video will paste to the Video 1/Audio 1 track at the position of the playhead.

There is no way to change which track it pastes to. If you paste it into a group of existing clips, it will insert into the clips and move all clips to its right further to its right.