Adjusting volume for only a portion of the song.

Is it possible to only adjust the volume on a portion of the song? There is PART of the song that gets REALLY loud and I would like to lower it JUST on that portion … Is this possible and HOW do I do that? Thanks!

Probably the best way is to use the Envelope Tool: https://manual.audacityteam.org/man/envelope_tool.html