What do the hash marks on a football field represent?

Question: What do the hash marks on a football field represent?

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Correct answer:

If you liked playing Trivia crack, you will also enjoy playing Pixwords. You can find all the answers to your language:

• pixwordsanswers.net (Pixwords english)
• pixwordssoluzioni.org (Pixwords italiano)
• pixwordsmegoldasok.org (Pixwords magyar)
• pixwordslosungen.com (Pixwords Deutsch)
• pixwordssolution.net (Pixwords Francais)
• pixwordsnapoveda.net (Pixwords Czech)
• pixwordsluseis.com (Pixwords Greek)
• raspunsuripixwords.org (Pixwords Romanian)