Final answer:
When choosing a topic for an informative speech, choose a subject with a lot of evidence. For a persuasive speech, choose a topic you are passionate about.
Step-by-step explanation:
When narrowing down your topic for an informative speech, it is important to choose a subject with a lot of evidence to support your points. For example, if you are interested in giving a speech about climate change, there is a wealth of scientific research and data available to back up your claims. This can make your speech more credible and persuasive to your audience.
On the other hand, when choosing a topic for a persuasive speech, you may want to consider an issue that you feel strongly about and can present a persuasive argument for. For instance, if you are passionate about animal rights, you can choose a topic like the ethical treatment of animals in factory farms. By adopting a stance that opposes your original position, you can gather evidence to refute your previous perspective and appeal to your audience.