How to block access using htaccess not to a folder, but to a specific file?

Question

htaccess

How to block access using htaccess not to a folder, but to a specific file?
For example, a file at the root / abc.html
Who will tell you?

Answer 1

did that mean? htaccess should be next to the file

<Files "abc.html">
Order Allow,Deny
Deny from all
</Files>

Answer 2

Not really.
Already decided by myself.
For those who are interested.
AuthType Basic
AuthName "Private zone."
AuthUserFile /var/www/password file path/.htpasswd
require valid-user