How to find out from which keyword a click/lead was generated in Google Ads?

Question

Google Ads

1. Hello, how can I find out from which key phrase the transition to the site from advertising in Google Ads was made? And how do you know which keyword was the conversion from?
   I understand that I need to connect (I don’t want to use the tag, I just thought to insert the AdAnalytics code on each page of the site and pads), I understand that I need to insert a link to the site with UTM tags, but the question is where to look in Google AdAnalytics itself?
   
2. The situation is as follows: traffic from advertising goes to the site, then it goes from the site to the site and is converted. Can I somehow make it so that I know from which key the client came to the site and somehow identify this client when he went from the site to the site and the conversion occurred??
   
3. Is it possible to track which key a lead came from without linking a Google Ads account to Google Analytics (a fundamental question)