As he says this at the very beginning he makes the boys understand that there will be severe consequences for their failure and that one of them will be fired in the end. .
By using his tone of voice he indicates his frustration with the candidates and he portrays his urgency to see who exactly was at fault, making the boys panicky. Adam immediately attempts to put the blame on one of the others when he mentions the failure of the task being the location, in order to try and distract Lord Sugar's attention from anything he has done wrong during the task. Arjun and Rhys also try and blame others for the failure of the task. However, Arjun does this better than Rhys does due to Rhys's approach being argumentative and childlike. Whereas, we see that Arjun speaks with a manner of professionalism and instead of putting the blame on others to prevent getting fired, Arjun uses jargon such as "poor delegation" and "profit margin" to help himself. He doesn't get in the petty little fight of shifting the blame, which pleases Lord Sugar and shows the contrast between the candidates. .
Rhys' arguing frustrates the other candidates and they begin to argue with him. Rhys becomes defensive when he is accused of being responsible for the location. II don't feel that I pushed it too much," justifying himself to Lord Sugar that he is not to blame. Rhys' defensiveness leads him into an argument with Jordan. They then interrupt each other repeatedly to try and get their points heard. This implies that the boys start to lose respect for one another when they are nervous and panicky. Lord Sugar senses that Rhys is being defensive and he targets him to try and find out what went wrong. Rhys becomes agitated and gives Lord Sugar excuses such as "there was an opportunity to sell more cheese." Here, Rhys looks at Lord Sugar to try and see what he thinks of it. Lord Sugar replies with a non-convincing "hmm," representing his worry and disbelief.