Choosing an informative speech topic to emphasize the objective and parameters of speech and offer some advice?. The topic must be informative. That means that you should not choose an argumentative subject or anything that has a two + side controversy. Think of this as teaching speech. You are not attempting to change your audience attitude behaviors. You need to be a subject matter experts Wi will teach your audience something they did not previously know. Can you find research on any of those subjects on your list in the ccbc library?