Final answer:
A hyphen is used to create compound adjectives that appear before nouns.
Step-by-step explanation:
An appropriate use for a hyphen is to create compound adjectives that appear before nouns. When multiple words work together as a single adjective to describe a noun, a hyphen is used to connect them.
For example, in the phrase 'a well-known author,' 'well-known' is a compound adjective. Here, the hyphen helps the reader understand that 'well' and 'known' should be read as a single concept modifying the noun 'author'.
The correct option for an appropriate use of a hyphen is 'To create compound adjectives that appear before nouns'.
Learn more about Hyphens