Respuesta :
Answer:
anatomy
Explanation:
Anatomy is a branch of natural science which deals with the structural organization of living things.
If you study bird anatomy, you'll learn that birds' bodies are well-adapted for flight. The correct answer is option b.
What is anatomy?
Anatomy is that branch of science that is concerned with the study of the physiology or bodily structure of all organisms.
It can hence be inferred from the above sentence that the missing word is Anatomy.
Learn more about anatomy at:
https://brainly.com/question/896286