Challenging Riddles For Your Eye

4. Which square should be in place of the question mark?

When searching for an answer of things which fly without wings that also cry we're stumped. Even animals which glide have wings and they're about the only things that can fly and cry right? What if flying didn't literally mean flying? Flying without wings might mean to float. Perhaps crying is also not a literal description. The answer which is clouds then becomes much easier to reach.