温度直接影响动物的体温，从而影响着（）、（）和（）等。

Alex, who has recently lost his two dogs, decides to stick a poster outside his offi ce describing the characteristics of the dogs and offering EUR5,000 as reward to anyone who returns the dogs to him. Beatrice, who has read the advertisement, fi nds and returns one of the lost dogs to Alex. Catherine, who has not read the advertisement, fi nds and returns the other lost dog to Alex.Required:Advise Alex as to his liability, if any, to Beatrice and Catherine. (10 marks)