Which object has the most thermal energy?

 - a 9-kilogram bucket of water at a temperature of 14°C
 - a 9-kilogram bucket of water at a temperature of 21°C
 - a 9-kilogram bucket of water at a temperature of 35°C
All three buckets of water have the same mass but different temperatures. Since the 35°C bucket of water is the hottest, it has the most thermal energy.