Final answer:
False teeth, bats, and stars fall under different fields of study, specifically in biology, dentistry, and astronomy.
Step-by-step explanation:
Subject: Biology
False teeth, bats, and stars are all unrelated topics that fall under different fields of study. False teeth are a product of dentistry, which is a branch of medicine. Bats are mammals and are studied in the field of biology, specifically in the subfield of zoology. Stars, on the other hand, are celestial objects studied in the field of astronomy, another branch of science. Therefore, the subject of this question is Biology.