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

Example Input: Passage: A snowflake is made of ice, or water in the solid state. A solid is one of four well-known states of matter. The other three states are liquid, gas, and plasma. Compared with these other states of matter, solids have particles that are much more tightly packed together. The particles are held rigidly in place by all the other particles around them so they can't slip past one another or move apart. This gives solids a fixed shape and a fixed volume. Answer: plasma
Example Output: What state of matter completes the list: solid, liquid, gas?

Example Input: Passage: The population is an important unit in ecology as well as other biological sciences. How is a population defined, and what are the strengths and weaknesses of this definition? Are there some species that at certain times or places are not in populations?. Answer: cell division
Example Output: During interphase, the cell undergoes normal growth processes while also preparing for what, by accumulating energy and building blocks of dna?

Example Input: Passage: The oceans are most polluted along coasts. Why do you think that's the case? Of course, it's because most pollution enters the oceans from the land. Runoff and rivers carry the majority of pollution into the ocean. Many cities dump their wastewater , water mixed with waste, directly into coastal waters. In some parts of the world, raw sewage and trash may be thrown into the water ( Figure below ). Coastal water may become so polluted that people get sick if they swim in it or eat seafood from it. The polluted water may also kill fish and other ocean life. Answer: along coasts
Example Output:
Where are the oceans most polluted?