Translation:Een levend dier
In this case I do not understand why there is no e at the end of levend.
Have a read through this: https://www.duolingo.com/comment/3888221
The "levend" does not get E-ending because 'dier' is "Het" word.
The link seems to be gone. I had the same question. :)
It's working for me, though there are some technical issues which may explain why it's not for you at the moment.
Similar explanation: http://www.valley-trail.com/Adjectives.htm