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

Example Input: Passage: The last major ice age took place in the Pleistocene. This epoch lasted from 2 million to 14,000 years ago. Earth's temperature was only 5 C (9 F) cooler than it is today. But glaciers covered much of the Northern Hemisphere. In Figure below , you can see how far south they went. Clearly, a small change in temperature can have a big impact on the planet. Humans lived during this ice age. Answer: pleistocene
Example Output: The last major ice age took place in which era?

Example Input: Passage: From a human point of view, natural resources can be classified as either renewable or nonrenewable. Answer: renewable or nonrenewable
Example Output: How can natural resources be classified from a human point of view?

Example Input: Passage: The brain is a marvelous organ. And it's a hungry one, too. The major fuel for the brain is the carbohydrate glucose. The average adult brain represents about 2% of our body's weight, but uses 25% of the glucose in the body. Moreover, specific areas of the brain use glucose at different rates. If you are concentrating hard, (taking a test, for example) certain parts of the brain need a lot of extra glucose while other parts of the brain only use their normal amount. Something to think about. Answer: glucose
Example Output:
The major fuel for the brain is which carbohydrate?