Answer:
D. Velocity and pressure
Explanation:
Bernoulli's principle relates the pressure and the velocity of a fluid with the following equation:
[tex]p+\frac{1}{2}\rho v^2 = const.[/tex]
where
p is the pressure
[tex]\rho[/tex] is the fluid density
v is the velocity of the fluid
According to this relationship, we see that if the pressure in the fluid increases, the velocity decreases, and vice-versa.
From the equation, we also notice that the correct answer is
D. Velocity and pressure
since these are the two quantities involved in the equation.