Answer:
 Capitalize proper nouns—and adjectives derived from proper nouns. 
 
Examples: 
the Golden Gate Bridge 
the Grand Canyon 
a Russian song 
a Shakespearean sonnet 
a Freudian slip 
 
With the passage of time, some words originally derived from proper nouns have taken on a life, and authority, of their own and no longer require capitalization. 
 
Examples: 
herculean (from the mythological hero Hercules) 
quixotic (from the hero of the classic novel Don Quixote) 
draconian (from ancient-Athenian lawgiver Draco) 
 
The main function of capitals is to focus attention on particular elements within any group of people, places, or things. We can speak of a lake in the middle of the country, or we can be more specific and say Lake Michigan, which distinguishes it from every other lake on earth.
Step-by-step explanation: