Final answer:
Lucy is important in the field of anthropology because she is an ancient human ancestor whose discovery provided valuable insights into human evolution.
Step-by-step explanation:
Lucy is important in the field of anthropology because she is an ancient human ancestor whose discovery provided valuable insights into human evolution. Lucy, an Australopithecus afarensis, lived about 3.2 million years ago and her skeletal remains have revealed important information about our ancestors' morphology, locomotion, and behavior. Her discovery and subsequent study have helped researchers better understand the origins of the human species and our evolutionary history.