What are examples of thesis statements that need rewritten?

The Scarlet Letter - examples of bad thesis statements:

A The Scarlet Letter has many themes.

B In this essay, I will tell you how The Scarlet Letter is an amazing story.

C The Scarlet Letter is about a red letter

A good thesis statement is:

D One of the main themes of The Scarlet Letter is that hidden sin destroys the soul, while revealed sin cleanses it

To Kill a Mockingbird examples of bad thesis statements:

A To Kill a Mockingbird has a bunch of characters in it.

B. The main characters in To Kill a Mockingbird are Scout and her brother.

C. Scout and Jem in To Kill a Mockingbird grew up without their mother.

A good thesis statement:

Through the eyes of a young girl, To Kill a Mockingbird by Harper Lee, immerses readers in a story of the struggle for justice amid racial and cultural hatred.