I can’t tell whether it’s real or fake.
Is there a way to find out if my significant other is a psychopath?
We should have put collars on our dogs, because now it's difficult to tell which one is mine and which one is yours.
You see something, then you separate (分ける) it. This is the same thing as to distinguish.
You should know the reading of 見 already. The second part, 分ける is a word you should have learned in the previous level. Combine that knowledge together and you get the reading for this word.