Using commas

While they watched the match, Anita clapped, cheered, and kept score.

Antonio asked her name, signed a tennis ball, and shook her head.

Because they enjoyed the match so much, Travis, Nick, and Anita made plans to come back for the final match the next day.

Correct ... all of them! =)

While they watched the match, Anita clapped, cheered, and kept score.

Antonio asked her name, signed a tennis ball, and shook her head.

Because they enjoyed the match so much, Travis, Nick, and Anita made plans to come back for the final match the next day.

The Vixens signed autographs after the game, and Estevan was the first in line.

In the given sentences, there are several uses of commas. Commas are punctuation marks that are used to separate or clarify different parts of a sentence. Here's how the commas are used in each sentence:

1. "While they watched the match, Anita clapped, cheered, and kept score."
- Commas are used to separate the introductory phrase "While they watched the match" from the main part of the sentence.
- Commas are also used to separate a list of actions performed by Anita: "clapped, cheered, and kept score."

2. "Antonio asked her name, signed a tennis ball, and shook her head."
- Commas are used to separate a list of actions performed by Antonio: "asked her name, signed a tennis ball, and shook her head."

3. "Because they enjoyed the match so much, Travis, Nick, and Anita made plans to come back for the final match the next day."
- Commas are used to separate the introductory clause "Because they enjoyed the match so much" from the main part of the sentence.
- Commas are also used to separate the names of individuals involved in making plans: "Travis, Nick, and Anita."

Using commas correctly helps to clarify the meaning of a sentence and improve its readability.