Since it seems like there is some grasping and gasping here, some hints:
All strakes, keels, concaves and channels contribute to lateral and directional stability by creating force in proportion to their angle to the water flow.
For lifting strakes on vee bottom boats, this means they increase lift as well as help the boat go straight.
For channels on boards, this means they help tracking.
The nonsense about "accelerating water" reflects a truth: in case of deep concaves or channels that effectively change the rocker in the center as compare to the rails, the channel or concave fails to decelerate the water as much as would happen if the rocker were the same from rail to rail.
Etc. just think about the flow of the water along the board and how the design features affect it, it's not hard to get a grip on how designs work, beyond the mumbo jumbo.