このパズルの完成タイム写真The acorn, or oak nut, is the nut of the oak tree. Acorns are too heavy for wind dispersal, instead animals, such as squirrels and jays serve as seed dispersal agents. Acorns served an important role in early human history and were a source of food for many cultures around the world. このジグソーパズルを共有する | ||