1. Look at all the ostriches, Raoul.
2. There are ostrich farms in Arizona, Arkansas, California, and Texas.
3. These birds are large, powerful animals.
4. On September 12, 1882, a New York newspaper wrote a story about ostrich feathers.
5. Anaheim, California was the location of the first ostrich farm in the United States.
6. The first baby ostrich, which belonged to Billie Frantz, was born on July 4, 1883.
7. By the end of 1911, there were more than six thousand ostriches in the United States.
8. Feathers, which are clipped not plucked, are harvested every eight or nine months
9. Ostrich feathers, which are used as decoration, are in demand.
10. they decorate hats, fans, feather dusters, and several other items.
On #2 and #10, note that the last common in the sentence is the Oxford comma, and thus is optional. If your teacher questions you on it, don't feel afraid to say you know this, and ask which they would prefer.
It would take a long while to explain each separate example, so please feel free to ask about any of the answers you don't understand.