Which best defines the concept of research in the context of speech preparation?

The concept of research in the context of speech preparation is best defined as the raw materials that form the foundation of your speech. Research involves gathering various types of information, facts, statistics, examples, and insights that contribute to the development and substance of your speech. This foundational aspect is crucial, as it helps ensure that the speech is credible, informative, and engaging. By using thorough research, a speaker can build a strong case for their message and effectively connect with the audience.

The other options do not fully capture the scope or purpose of research. For instance, citing sources pertains specifically to the references used in supporting claims, but it does not encompass the breadth of information gathered. Similarly, while all the information included in a speech might involve research, it doesn't specify the importance of the foundational materials that support the speech's structure and argumentation. Finally, limiting research to only evidence used to support arguments ignores the comprehensive body of knowledge needed to create a well-rounded speech. Therefore, defining research as the raw materials emphasizes its role in shaping and enriching the overall message being communicated.