Here's why:
* Buoyant force is caused by the pressure difference. The pressure at the bottom of an object submerged in a fluid is greater than the pressure at the top. This pressure difference creates an upward force.
* Archimedes' Principle states that the buoyant force on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. Since the weight of the fluid acts downward, the buoyant force must act upward to counteract it.
Therefore, regardless of the shape or orientation of the object, the buoyant force will always point upwards.