#### Answer

The amount of water that is displaced by the boat is directly related to the boat's weight. Therefore, we can use the displacement of water to describe a boat's weight.

#### Work Step by Step

When a boat floats in water, the boat displaces a certain volume of water. The amount of water that is displaced by the boat is directly related to the boat's weight. Therefore, we can use the displacement of water to describe a boat's weight.
According to Archimedes' principle, the weight of water that is displaced by the boat is equal to the weight of the boat.