Which image is used for thumbnail in List Category Post plugin [closed]

It uses the get_the_post_thumbnail function:

Gets Post Thumbnail as set in post’s or page’s edit screen and returns
an HTML image element representing a Post Thumbnail, if there is any,
otherwise an empty string.

The other options you mention are not included in the plugin now, but they will be considered for future versions.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)