Explain why an air bubble in water rises from bottom to top and grows in size?

Explanation

We know that fluid moves from higher pressure to lower pressure and in a fluid, pressure increases with depth, so, pressure at the top (`=P_(0)`) is less than that at the bottom `(=P_(0)+hthog)`. And so, the air bubble moves from bottom to top. It cannot move sideways as the pressure at the same level in a fluid is same. Furthermore in coming from bottom to top, pressure of air inside the bubble also decreases. Then in accordance with Boyle.s law volume of the bubble increases.`(ppro(1)/(V))`