When constructing a speech, the thing to keep in mind is there are three main parts—an introduction, the body, and the conclusion. In the introduction, you’ll want to have an attention getter that draws the audience in. One way to do this if speaking about Obesity: A Curse is to, perhaps, mention a shocking statistic or even an anecdote. Then (think of a speech like an essay where you’ll have a thesis statement), preface the speech by mentioning the three points you’ll discuss. Then, in the order you mention your three points, discuss the points in one paragraph each for the body mentioning your strongest point last and second strongest first. After that, with your conclusion recap all of the points mentioned and have a call to action for the audience or even a “what if” scenario if obesity is not addressed.
Not having the excerpt here, I can only help you to find the answer. Mood is the feeling you get when you read the passage. Foreboding is fearful or apprehensive. Welcoming is or can be joyful and accommodating or making someone feel comfortable in their surroundings. Sorrowful is sad or mournful. Optimistic is positive, hopeful, and confident about your future. As you read the passage, which of these are you feeling or closely matches your feelings.