The punctuation marks missing in the sentences below is comma.
<h3>What are punctuation marks?</h3>
Punctuation marks are used in English language to organise sentence formation in such a way as to make meaning to the reader.
Example of punctuation marks include the comma(,). The comma is used to separate list of items and independent clauses.
From the above statement,
- I made hamburgers, corn, and green beans for dinner. A comma is inserted between hamburgers and corn.
- Tiana will invite her uncles, mrs. hernandez, and ms. gilbert. A comma should be added after mrs. hernandez.
Learn more about punctuation marks here:
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Can video games be addictive? A recent study by Iowa State University concluded that 1 in 12 American children between the ages of 8 and 18 are addicted to video games. This figures show “gaming” as an addictive pathology, the same way that people are addicted to drugs or gambling. "Pathological gamers" spend more than 24 hours a week playing video games, which is twice the amount of time spent by most players. Researchers are concerned that the United Sates may be following in the footsteps of South Korea. South Korea has more than one hundred clinics to treat video-game addiction. The American Academy of Pediatrics recommends no more than two hours a day of "screen time." this includes television, movies and the internet.
relaxation and peacefulness
It matters the subject or requirement. Learning can be good when you are learning something big and important and learning can be bad when learning bad habits and more. Hope this answers your question :D