Animals and leafy plants but mainly animals
People in a democracy have the right to choose or have a say in the nation's decisions. Whereas in a republic, only the person in charge can decide.
He was forced to marry a women that he didn't love and was still in love with a different women and after the women that Dante really loved died in 1290 Dante wrote Vtia Nuova (The New Life) which is about his love for the women.