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.
What do whooping cranes eat? According to the National Wildlife Federation, whooping cranes have an omnivore's diet that includes crustaceans, small fish, insects, amphibians, reptiles, grains, marsh plants and acorns.