Answer:
Boyle's Law, because it describes what will happen in the relationship between the pressure and volume of the gas.
Step-by-step explanation:
Boyle was the scientist which gives the relationship between the volume and the pressure of a gas. Boyle's experiments tell what will occur in the relationship between volume and the pressure of gas.
Mathematically, the relationship can be written as :

or
PV = k
Where k is the constant.
So, the correct option is " Boyle's Law, because it describes what will happen in the relationship between the pressure and volume of the gas ".