"Les montagnes se trouvent juste derrière."
The mountains are behind what? There are several instances like this throughout the lessons.
but when i wrote 'the mountains are found just behind.' it marked it wrong. is it not correct?
I put the exact same answer and I also got it wrong which caused me to fail this mission. :(
I believe it would've used an article (le or la) to describe "it" if that were the case.
in this case, le/la are not articles but personal pronouns, in the object form, matching il/elle