Which of the following is not a solution?
saltwater
steel
vinegar
granite

Good evening, Laneyc!

Granite is not known as a solution because it has little pieces inside of it, so it cannot form all the way to an actual "solution".

I hope this answer has satisfied your needs, and if you have anymore questions, feel free to ask. Have a good night!

Granite is not a solution because is for making tables or floors.Saltwater comes from oceans or other salty places and is liquid. Vinegar is used in food and comes out liquid. But steel and Granite are both not solutions but steel can be melted.Also, Granite is a rock and you cannot liquidify rocks (or minerals either way.
So,Granite is not a solution
P.S.solutions are liquid shape things that can be not solid and not stay solid!
Hope this helps a lot:):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):)