What does viscosity describe? question 4 options:
a. a fluid's resistance to being heated
b. the rate of evaporation of a fluid
c. how much energy it takes to warm a fluid
d. the density of a fluid
e. a fluid's resistance to flowing

E. a fluid's resistance to flowing

Explanation:

Viscosity, also known as "thickness" is a rheological property that describes a fluid's resistance to flowing, fluids of low viscosity, like water, flow more easily while high viscosity fluids, like mud, are harder to move through. It is an important property because it determines the energy required to make a certain fluid flow.

conservation of mass

mass before something happens = mass afterwards