I have a Google account that I want to delete or close, but it is linked to Google Adsense account also. Plus, I use this account across all my websites and youtube videos for monetizing. So, my question is that if I close or delete this account, will it also affect my adsense account. If so, is there a way to keep adsense account and delete everything else?
If you delete your Google Account, it will not delete your AdSense account. However, you will be blocked from AdSense as you will not be able to access it using the invalid account. In other words, I do not think it is possible to achieve what you want to do.