Answer:
Sand is insoluble in water.
Step-by-step explanation:
We know that both salt and sugar are soluble. When we pour either of those substance into water, they completely dissolve to make the water clear. Same with jello powder. You cant make jello without water, and we all know that jello powder dissolves into the water to make colored water!!
hope this helps you, if you have any questions feel free to leave them in the comments :)