Which of the following properties of water would be most important in protecting a fish in a shallow pond on a hot summer day?
the low density of water in the solid phase
water’s strong forces of adhesion
water’s strong forces of cohesion
water’s solvent properties

The property of water which would be most important in protecting a fish in a shallow pond on a hot summer day are C. water's strong forces of cohesion.
A is incorrect because water is not solid during summer. D is also incorrect because solvency refers to it being able to dissolve. Adhesion has to do with water being attracted to other substances, so B is also incorrect.