Which of these sentences is the most formal in style?

Alice is noticeably confused by the White Queen’s assertion that events in the Looking-Glass land may happen in reverse.
Alice has serious doubts when the White Queen explains to her that stuff can happen in a backward way in the Looking-Glass land.
It seems to me that Alice is kind of confused when the White Queen tells her that a person can be punished for a later crime.
Many readers will probably agree with Alice when she says that the White Queen’s ideas are totally wacky

Alice is noticeably confused by the White Queen’s assertion that events in the Looking-Glass land may happen in reverse.

The most formal sentence in style would be: "Alice is noticeably confused by the White Queen’s assertion that events in the Looking-Glass land may happen in reverse."

To determine which sentence is the most formal in style, we can look at the language used and the level of formality conveyed.

Let's analyze the sentences:

1. Alice is noticeably confused by the White Queen's assertion that events in the Looking-Glass land may happen in reverse.

2. Alice has serious doubts when the White Queen explains to her that stuff can happen in a backward way in the Looking-Glass land.

3. It seems to me that Alice is kind of confused when the White Queen tells her that a person can be punished for a later crime.

4. Many readers will probably agree with Alice when she says that the White Queen's ideas are totally wacky.

Among these sentences, the most formal option is sentence 1:
"Alice is noticeably confused by the White Queen's assertion that events in the Looking-Glass land may happen in reverse."

This sentence is more formal because it uses a more sophisticated vocabulary ("noticeably confused" instead of "kind of confused") and maintains proper subject-verb agreement. Additionally, it presents the description in a more measured and professional tone.

Although the other sentences express similar ideas, they either use less formal language ("stuff," "totally wacky") or exhibit informal language structures ("It seems to me that...").

Remember, the choice of sentence style depends on the context and the intended audience.