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

Example Input: Passage: Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, and it is usually measured in meters. How it is measured is a little different for transverse and longitudinal waves. Answer: waves
Example Output: What do wavelengths measure the size of?

Example Input: Passage: The cardiovascular system moves nutrients and other substances throughout the body. Answer: cardiovascular system
Example Output: Which human body system system moves nutrients and other substances throughout the body?

Example Input: Passage: In intelligent mammals, such as primates, the cerebrum is larger compared to the rest of the brain. A larger cerebrum allows primates to develop higher levels of intelligence. Primates have the ability to learn new behaviors. They also engage in complex social interactions, such as fighting and play. Answer: cerebrum
Example Output:
What part of the brain is largest in intelligent mammals?