A vessel equipped with sails utilizes which type of propulsion?

A vessel equipped with sails is primarily propelled by wind, making "Sail" the correct description of its propulsion method. Sails capture the wind's force and convert it into movement, allowing the vessel to travel across water. This form of propulsion leverages natural elements, highlighting the unique advantage of sailing vessels compared to those that rely on mechanical means.

While options like "Propellor" and "Water Jet" refer to motorized forms of propulsion that utilize engines or mechanical systems to move water and generate thrust, they do not apply to a vessel that relies solely on sails. Similarly, "Manual" does not accurately describe the propulsion of a sailing vessel, as this term typically refers to movement generated by human effort, such as rowing. Thus, the inclusion of "Sail" accurately captures the unique mechanism by which a sailing vessel operates, emphasizing the reliance on wind as the means of propulsion.