"Tiu malgranda besto estas kuniklo."

Translation: That small animal is a rabbit.

[ChuckBaggett]

Seems like it should take "That little animal is a rabbit. ". I reported it.

[Rarar.]

Is there any difference between tiu and tio , please?
tiu = that and I also noticed tio = that
Tio estas malfacila frazo.
https://forum.duolingo.com/comment/27799128 :That is a difficult sentence.

[LouisSepdekdu]

Tio always stands alone. Tio estas malfacila frazo = that is a difficult sentence.

Tiu is a determiner. Tiu frazo estas malfacila = that sentence is difficult.

When you find tiu alone, there's an implied "one". Tiu estas malfacila frazo = that one is a difficult sentence.

[ocean6918]

Hey Tomaso! Do you have a blog for demonstratives in Esperanto? If yes, pls post the link here

[salivanto]

I'm sorry, no I don't.

Maybe that will be a project for my yet-to-be-forthcoming textbook.