Fact 1: Asolution is formed by one substance being dissolved in another substance.

Fact 2: Another dissolved substance in ocean water is a type of rock called limestone .

Given the two facts above, answer the question "A solution is formed when limestone is dissolved in what?" with the following options: 
- old caves
 - habitats
 - body water
 - rainfall
 - calcite
 - sandy shores
 - evaporation
 - ocean water


 

        ocean water 