Okay. Here we go.
What is this?
1. Sand and snow. A picture from the beach retreat the day after the snow came.
2. Salt. Epsom to be exact. I dropped a bag on a very humid day and it immediately swelled up and looked like this.
3. The aftermath of a marshmallow battle gone bad. Picture taken the next morning after the 'mallows were subject to rain.
So, there you have it.
Only one is correct. Which one?