Where do you put commas in a sentence

USE A COMMA TO SEPARATE INDEPENDENT CLAUSES.

USE A COMMA AFTER AN INTRODUCTORY CLAUSE OR PHRASE.

USE A COMMA BETWEEN ALL ITEMS IN A SERIES.

USE COMMAS TO SET OFF NONRESTRICTIVE CLAUSES.

USE A COMMA TO SET OFF APPOSITIVES.

USE A COMMA TO INDICATE DIRECT ADDRESS.

Explanation:

Use commas to separate independent clauses when they are joined by any of these seven coordinating conjunctions: and, but, for, or, nor, so, yet.

Use commas after introductory

a) clauses,

b) phrases

c) words that come before the main clause.

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.