Question

correct the text by inserting four commas. (note: in this skill, serial commas are not optional.)
in the 1930s, traveling circuses often featured elephants clowns show horses acrobats and tightrope walkers.

Explanation:

To correct the text, we need to insert commas to separate the items in the list (elephants, clowns, show horses, acrobats) as serial commas are required. The list items are "elephants", "clowns", "show horses", "acrobats", and then "tightrope walkers" with "and" before it. So we insert commas after "elephants", "clowns", "show horses", and "acrobats".

Answer:

In the 1930s, traveling circuses often featured elephants, clowns, show horses, acrobats, and tightrope walkers.