Correct the 4 capitalization errors

Mark Twain spent his childhood on the Banks of the Mississippi river in Missouri, which influenced the themes and settings of his classic american novels

Mark Twain spent his childhood on the banks of the Mississippi River in Missouri, which influenced the themes and settings of his classic American novels.

So what are the 4 capitalization errors

The four capitalization errors in the given sentence are:

1. "Banks" should be capitalized as "banks."
2. "Mississippi" should be capitalized as "Mississippi."
3. "River" should be capitalized as "River."
4. "American" should be capitalized as "American."

Every example after 1 are already capitalized, what are some words the should or shouldn’t have capitalization

Apologies for the confusion. Here are some examples of words that should or shouldn't have capitalization in the given sentence:

Words that should have capitalization:
- Mark Twain (proper noun)
- Mississippi River (proper noun)
- Missouri (proper noun)
- American (referring to nationality)

Words that shouldn't have capitalization:
- banks (common noun)
- the (article)
- which (pronoun)
- themes (common noun)
- settings (common noun)
- classic (adjective)
- novels (common noun)

Should novels in American novels have capitalization?

Apologies for the oversight. "Novels" in "classic American novels" should not be capitalized unless it is at the beginning of a sentence.