Bernoulli's principle relates:

The area $($A$)$ within a tube $($or between two adjacent streamlines$)$ to the speed $($V$)$ of the air flowing through

The static pressure $($P$)$ of the air flowing through a tube $($or between two adjacent streamlines$)$ to the dynamic pressure and speed $($V$)$ of the air flowing through

The weight $($W$)$ of the air flowing through a tube $($or between two adjacent streamlines$)$ to the speed $(V)$ of the air flowing through