As water is cooled, its density until it reaches about 4° C.
A. decreases
B. increases
C. decreases and increases
D. stays the same

As water is cooled its density increases 4 degrees Celsius is reached

Cooling causes water to slow down at a faster rate occupying a smaller rate as hot water is less dense than the room temperature as cold water is denser and will freeze at room temperature.

Water being a solvent has various physical and chemical properties.

Water has to condense to a certain point to produce the desired effects.

So B) Increases

the answer will be a) proteins i believe