instruction:
In this task, you are given a paragraph, and your task is to construct a question from the given passage. Construct question in such a way that (i) it is well explained in the paragraph, (ii) the words may/may not be present in the paragraph, (iii) it should start with what/how/describe. Avoid creating a question that (i) is just relevant to one or two sentences, and (ii) not relevant to passage.
question:
A nuclear reactor generates heat by nuclear fission. The heat created raises steam. The steam runs through turbines. The turbines generate electricity. The electricity leaves the station.
answer:
How does a nuclear-powered power station generate electricity?

question:
Water in the clouds becomes very cold. The cold water forms ice crystals. The ice crystals grow by absorbing surrounding water droplets. Form snowflakes. The snowflakes fall to the ground.
answer:
How does snow form?

question:
You breathe in. Diaphragm and other muscles expand to allow room for your lungs to fill. The air flows into the narrow bronchioles in the lungs. From the bronchioles to the alveoli. The oxygen enters into the bloodstream. Is switched with the carbon dioxide in the bloodstream. The carbon dioxide enters through the alveoli. Through the narrow bronchioles. Into the lungs. The carbon dioxide is exhaled out of the body.
answer:
How do lungs work?