Final answer:
The inward pressure of a bubble changes because the water pressure around it decreases as it rises, not because of atmospheric pressure. Buoyant force plays a role in the bubble's rise, but the internal pressure decreases due to the expanding bubble balancing the surrounding water pressure and surface tension.
Step-by-step explanation:
The inward pressure of a bubble does indeed change as it moves up through a fluid, such as water. However, the main reason for this is not due to atmospheric pressure or buoyancy directly, but rather because of the change in water pressure around the bubble as it rises. As a bubble ascends, the water pressure around it decreases because pressure in a fluid increases with depth. Since the atmospheric pressure is essentially constant at the water's surface level, it does not have a direct effect on the bubble as it moves up. Hence, the buoyant force exerted on the bubble by the surrounding water does make it rise upwards because it is less dense than the water. Buoyancy is an upward force exerted by a fluid that opposes the weight of an object immersed in the fluid.
If we are referring to the inward pressure that the bubble's surface tension exerts on the gas inside, that internal pressure will decrease as the bubble rises and the external water pressure decreases because the bubble expands. This expansion is a result of the gas inside the bubble maintaining a pressure that is the sum of the external fluid pressure and the pressure provided by the surface tension of the bubble itself. Therefore, the correct answer is B) No, due to reduced atmospheric pressure, although the reasoning is more closely associated with the reduced water pressure around the bubble as it rises rather than a change in atmospheric pressure.