The answer would be substance Y because as the temperature is being increased the amount of substance that will dissolve in the water is decreasing. I hope this helped
<span>Some neanderthal skulls have cranial capacities that are LARGER AND HAVE MORE PROMINENT FEATURES than those of the average modern human. Neanderthals have defining features or structures on their skulls that separate them from modern human, among these are large eye sockets and higher bone density. </span>