Within the branches of a eucalyptus tree in Australia lives one of God's special creations, the cuddly koala. He is often called a koala "bear," but he is not a bear. He is a marsupial or a "pouched" animal. The koala is native only to Australia. He has large bushy ears, a black nose, and no tail. He would make a nice pet, but he rarely survives in captivity. Once hunted for his fur, the koala now enjoys government protection.
"Once hunted for his fur, the koala now enjoys government protection."
This sentence is an example of a(n) _____.