In which phrase is the hyphen used correctly?

sharp-fanged cat
hill-country orchard
west-virginian accent
badly-needed rain

The correct answer for this question would be the first option. The phrase that has a hyphen used correctly is this: sharp-fanged cat. In this case, a hyphen is used because the word sharp-fanged is an example of a compound word. A compound word consists of two or more words that are connected by a hyphen to create a new word with a new meaning. Hope this answer helps.