Answer:
Biology.
Step-by-step explanation:
Science may be defined as the subject that provides knowledge about the whole universe. Different fields of science are chemistry, biology, physics and geology.
The police send a skeleton to Gwen to identify whether the skeleton belongs to a male or female.The biology field was used to identify the skeleton by looking at the pelvic bone. Biology is a branch of science that studies about the living organisms.
Thus, the answer is option (B).