"They seem natural."

Translation: Eles parecem naturais.

[saniac]

I answered "Parecem natureis" and was marked wrong "you missed a word". Why is the pronoun eles needed here? Or was Duolingo failing me because of the spelling error but giving the wrong reason?

[Paulenrique]

"Parecem naturais" should work too!!

[melesana]

Nope, saniac. I spelled "naturais" right, and still got makred wrong for leaving off "Eles" - "you missed a word."