People took care of the plants and collected the seeds. They carried the seeds around the world so they could grow the plants they liked wherever they lived.

To learn more about the history of plants:

1. Go to the Where's It From? WWW Sheet and print it.

2. Visit these Web sites. Then do the WWW Sheet.
    Cacao (Chocolate)
    Broccoli
    Carrots

3. For more information, visit this Web site.
    Where Food Crops Originated