What is the best method for achieving an informal style in a speech?

Using contractions is the best method for achieving an informal style in a speech because they create a conversational tone that makes the speaker sound more relatable and approachable. This style helps to bridge the gap between the speaker and the audience, making the speech feel more like a dialogue rather than a formal presentation. For example, saying "don't" instead of "do not" or "you're" instead of "you are" tends to resonate better with listeners and encourages engagement.

While using slang can also contribute to an informal style, it may not be universally understood by all audience members, potentially leading to misunderstandings. Defining technical terms is typically associated with a more formal approach, as it seeks to clarify specialized language rather than promote a casual atmosphere. Including hypothetical examples can be useful for illustrating points but does not inherently shift the speech to an informal tone. Therefore, utilizing contractions effectively strikes the right balance for a relaxed, engaging speech.