Punctuation is the name for marks used in writing. They are to help understanding and correct reading. These are some common punctuation marks used in English: . is a period or full stop.
In the past, less affluent Okinawans ate sweet potatoes. Lots and lots of sweet potatoes. Rice, especially white rice, was more expensive and was a bit of a status symbol: it was something consumed only by the wealthier folks.
A vegan diet includes all grains, beans, legumes, vegetables and fruits and the nearly infinite number of foods made by combining them. In addition, many vegan versions of familiar foods are available, so you can eat vegan hot dogs, ice cream, cheese, and vegan mayonnaise along with the more familiar veggie burgers.