What variable affects what a boat can carry?

The primary variable that affects what a boat can carry is its buoyancy, which is determined by its design and the materials used in its construction. The boat's weight capacity is influenced by factors such as its size, shape, and the distribution of weight within the vessel. Additionally, water conditions, including density and wave action, can impact how much cargo a boat can safely transport. Lastly, regulatory limits and safety guidelines also play a crucial role in determining a boat's carrying capacity.