A picture of the table would be better next time. It's hard to understand when it's all jumbled together. * When something is soluble in water, it mixes with the water. An example from your table is the drink mix, it mixes with the water to make a drink (like kool-aid). Plastic on the other hand does not mix with water. So plastic is not soluble in water.
There is only one logical choice from the multiple choice answers.
Sand is insoluble in water.
