www.give.example.com is exactly like give.example.com in the DNS, but they are separate names, so once you put a record for give.example.com that says nothing for www.give.example.com (except in cases of delegations, which is not the case here).
So you need records for both, such as in your zonefile (or equivalent in any provider UI or API):
give A 192.0.2....
You shouldn't worry about it at all. Feel free to delete the record as the only sense of keeping it has been lost since you left Facebook
Originally TXT record was intended as a place for human-readable notes, nowadays it mostly turned into kinda stickers-board handling machine-readable data
As declared in specification, the data of TXT record should be
Your question is unclear:
it has to be assumed that there are more than zero domain names in existence which have not been purchased yet. Therefore, does that mean that they aren't owned?
A domain either exists (is registered) or not. If it exists then it was registered (and paid for, except in rare exceptions) by someone that decided who is its current ...
Once you use point the NS (name server) records to Bluehost, Google domains has no way of implementing the redirect. The steps for implementing the redirect are:
Add a DNS entry for the host being redirected pointing to the web server that will do the redirect.
Configure the web server to redirect requests for that domain to the desired location.
Your website is https://thewildfire.in/ (it would have been simpler to say so immediately at the start of your question insteady to rely on screenshots that are difficult to read, impossible to search on or to quote, even so much here that the important parts are just text lines that you could have pasted as is).
The software you show in screenshot seems to ...
Assuming you are using a new hosting for your website on another server than the one used before you owned the domain, you need to do nothing.
I would recommend using another approach to the one used to fix he sucuri reported issues. You need to find out, perhaps with Google ads support or search console reports why your website was flagged as malicious and ...
.de domain names, like some other ccTLDs do not have expiry dates. They live on as long as long you pay for them. That's why German providers often charge for the domain names by the month (around €1 or less/month is typical).
I could notice that Google Sites adds a <link rel="canonical" href="http://example.com/…" /> tag to all pages of a Google Sites website when a custom domain is attached to it.
After the setting of the custom domain, some time is needed for it to become effectively canonical.