Given a scientific passage and an answer, generate a question for the given answer.

Example Input: Passage: Density is defined as the mass of an object divided by its volume. Propose a unit of density in terms of the fundamental SI units. Answer: volume
Example Output: Density is defined as the mass of an object divided by its what?

Example Input: Passage: The bodies of organisms can make a sedimentary rock. Plant bodies are lithified to become coal. When shells are cemented together they make a type of limestone. So limestone can be considered chemical or organic. Answer: coal
Example Output: What is formed when plant bodies are lithified?

Example Input: Passage: Sutural bones are small, flat, irregularly shaped bones. They may be found between the flat bones of the skull. They vary in number, shape, size, and position. Answer: skull
Example Output:
In what area of the body are sutural bones found?