If an object is neutrally buoyant in seawater, what will happen in fresh water?

When an object is neutrally buoyant in seawater, it means that the object displaces a volume of water equal to its own weight, allowing it to neither sink nor float but rather to remain suspended within the water. Seawater is denser than fresh water due to its salt content.

When the same object is placed in fresh water, which has a lower density than seawater, the buoyant force acting on it will decrease because the amount of water displaced will not be sufficient to support the weight of the object. This will cause the object to sink in fresh water since it will now weigh more than the buoyant force it experiences.

In context, options suggesting that the object would float or remain neutral are incorrect because the reduced density of fresh water alters the buoyant forces acting on the object. Since the object displaces less water in fresh water than it does in seawater, it cannot maintain neutral buoyancy and will ultimately sink.