Final answer:
An example of a writer using an informal style would involve a conversational tone, colloquial language, and personal pronouns, such as in personal emails or storytelling between friends.
Step-by-step explanation:
The best example of a writer using an informal style can be characterized by a conversational tone, use of colloquial language, and personal pronouns like 'I'. For instance, if you are crafting an email to a friend or engaging in dialogue within a story, an informal style akin to example 1 may be suitable. This contrasts with an academic style, which is exemplified by formal language and structure, as in example 2, which would be more appropriate in an essay advocating for public transportation.
Mark Twain's Life on the Mississippi and Jane Austen's Pride and Prejudice are examples of literature that utilize an informal and conversational tone, which stands in contrast to the more technical and formal language that might be expected in professional or academic writing. This reveals the significance of context in determining whether an informal or formal style is appropriate.