How come warm water has more upthrust than cold water?

Warm water has a lower density than cold water, which means it exerts less gravitational force on objects submerged in it. When an object is placed in water, it experiences buoyant force (upthrust) equal to the weight of the water displaced. Since warm water is less dense, it displaces more weight relative to its volume compared to cold water, resulting in greater upthrust for objects in warm water. This principle is consistent with Archimedes' principle of buoyancy.