Final Answer:
Without chemistry, the science that would not exist among the given options is B. Biology.
Step-by-step explanation:
Chemistry is the foundational science that provides the understanding of the composition, structure, properties, and changes of matter. It serves as a fundamental link to several other scientific disciplines. While physics, geology, and astronomy are distinct fields with their own principles and laws, biology relies heavily on the principles of chemistry. Biochemical processes, the structure of biomolecules, and the interactions within living organisms are all rooted in chemical principles. Without chemistry, the study of life processes, cellular functions, and molecular biology—the essence of biology—would be severely limited.
Therefore, the answer is option B: Biology.