Question

insert one comma to separate the coordinate adjectives. typical golf caddie responsibilities include carrying clubs, cleaning balls, calculating distances and scores, and even replacing the divots — pieces of grass and dirt that have been cut loose by the swift forceful strikes of golf clubs.

Explanation:

Coordinate adjectives are adjectives that modify a noun equally and can be joined by 'and'. "Swift" and "forceful" both modify "strikes" and are coordinate adjectives. A comma should be inserted between them.

Answer:

Typical golf caddie responsibilities include carrying clubs, cleaning balls, calculating distances and scores, and even replacing the divots — pieces of grass and dirt that have been cut loose by the swift, forceful strikes of golf clubs.