6. what punctuation is used to separate items in a series if the
items themselves contain commas?
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You use semicolons (;)

Explanation:

If the sentence has too many commas, it becomes very confusing. The semicolon is a combination of a colon and a comma, and breaks the sentence up so that it's easier for the reader to understand.

A semi-colon is used    ;

Explanation:  Semi-colons allow the sentence to be broken up into spaces so that it is understandable. Without using too many commas. Although, if a semi-colon or a comma is used too much it can still create a run-on sentence.

there is no excerpt.

put the excerpt in the comments and ill answer.

a. conversing outside

explanation:

conversing outside is an example of a communication style.

i hope this you, and have a wonderful day!