Final answer:
Option A) The distribution of sand on the ocean floor is NOT a topic in biology.
Step-by-step explanation:
The topic that is NOT a topic in biology is option A) The distribution of sand on the ocean floor. Biology is the study of living organisms and their interactions with their environment, while the distribution of sand on the ocean floor falls under the domain of Earth science or geology. In biology, topics like the relationship between fungi and trees, the chemicals at work in the stomach, and the speed at which hummingbirds fly are all relevant and important areas of study.