Question

Which group of words is a sentence fragment? A. The ancestor of the dog. B. Adult male wolves typically weigh close to 100 pounds. C. The wolf is closest in appearance to a German shepherd. D. The gray wolf is a social animal, traveling in families.

Answer 1

"A. The ancestor of the dog." is a fragment. When in doubt, say the sentence out loud and ask yourself if there is enough information for the sentence to make sense.

Answer 2

A. The ancestor of the dog 

The ancestor of the dog is a sentence fragment because it is only a subject without a predicate.