What is the story/background information of this question?
Lizard live in many environments like the topical rain forest and desert but not in Antarctica
Answer:
It must be a short story that relates to the theme of the debate. A long story will be unnecessary and would take up space and time you could have used to talk about your other points and bolster your arguments. Starting with shocking statistics is a way of getting your audience to sit upright and pay closer attention to what you have to say.