I thought that -is is the ending for third person plural, meaning 'they smile'?
Simplified, as i understand, yes, for consonant-final verbs but "līrigon" is a vowel-final verb which end in -s for 3rd sing. and -si for 3rd pl.
Correct answer is 'She' is smiling, though it also accepts 'It' is smiling.
So how do you pronounce it
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I don't understand how this translates to she/he/it is smiling. How would you change this to translate to just 'smiling'?
"līris"
This probably just means smiling. What's he/she doing?? Smiling.