The correct answer is B. Microbiology.
Microbiology is the scientific study of microorganisms, which are organisms that are too small to be seen with the naked eye. Microorganisms include bacteria, archaea, fungi, protists, and viruses.
Evolution is the process by which species change over time. It is a gradual process that can take millions of years. Evolution is driven by natural selection, which is the process by which organisms that are better adapted to their environment are more likely to survive and reproduce.
Zoology is the scientific study of animals. Animals are multicellular, eukaryotic organisms that are able to move independently. They are found in all parts of the world and come in a wide variety of shapes and sizes.
Paleontology is the scientific study of fossils. Fossils are the remains or traces of ancient organisms that have been preserved in rocks. They can provide information about the evolution of life on Earth.
In conclusion, the study of microorganisms is termed as microbiology.