Why it is easier to lift a heaby stone under water than it air?

because, the gravity and density in water is much less then in normal air. so if someone or something above water is heavy, then under water it will seem alot less heavy. and another reason might be because many objects have air in them and in water air will float to the top. that's why cruise ships float and not sink, because of the air in them, it keeps them afloat. so if ur handling something under water that has air in it, its gonna seem alot lighter because its "trying" to get to the surface.