Answer:
He starts the speech in one with a tense tone. He chooses to start like this, because the reason why he is receiving the award has a serious meaning and that must be treated with the same tension with which it happened.
Step-by-step explanation:
Wiesel starts the speech by citing the dead in the holocaust and how the prize he is receiving is connected to these dead, as he is receiving a prize for the book he wrote about his own experiences in the concentration camps. Wiesel recognizes that he represents a people who suffered irrationally and that this cannot be treated with happiness, but with tension and that is why he starts the speech in a tense way.